Please cite this data as follows, and pay attention to the rights documented in the rights.txt:
Please respect the rights declared for each dataset in the download: 
Banc de dades de biodiversitat de Catalunya: Banc de dades de biodiversitat de Catalunya-VerteCat
Servicio de Vida Silvestre. Área de Acciones de Conservación. Subdirección General de Medio Natural. Dirección General de Calidad y Evaluación Ambiental y Medio Natural. MAGRAMA (2014). Inventario Español de Especies Terrestres (2014). Dirección General de Calidad y Evaluación Ambiental y Medio Natural. Ministerio de Agricultura, Alimentación y Medio Ambiente.
National Museum of Nature and Science, Japan: Bird specimens in Gifu Prefectural Museum
Institute of Systematics and Evolution of Animals, Polish Academy of Sciences: Aves Collection of Institute of Systematics and Evolution of Animals
GEO-Tag der Artenvielfalt: Birdrace-The_Ringers-Friesland
BeBIF Provider: Royal Museum of Central Africa - Albertian Rift Birds (ENBI wp13)
Senckenberg: Collection Ornithologie - ZSRO
UK National Biodiversity Network: Merseyside BioBank - North Merseyside Birds (unverified)
UK National Biodiversity Network: Staffordshire Ecological Record - SER Species-based Surveys
Varied sources. Individual references may be obtained from website (paleodb.org)
iNaturalist.org: iNaturalist research-grade observations
UK National Biodiversity Network: Rotherham Biological Records Centre - Rotherham Biological Records Centre - Non-sensitive Records from all taxonomic groups
Cite the source of recordings as Macaulay Library (ML).<br><br>

When possible, include the following data in your citation:<br><br>

ML Media-collection Catalog-number<br>
Common Name - Scientific name<br>
Recordist<br>
Location<br>
Date<br>
Macaulay Library/Cornell<br><br>

For example:<br><br>

ML Audio 2081<br>
Green Heron - Butorides virescens<br>
Sutherland, Charles A<br>
United States, New York, Tompkins, 3 km NE of Ithaca, Sapsucker Woods Pond<br>
29 July 1962<br>
Macaulay Library, www.macaulaylibrary.org<br>
Cornell Lab of Ornithology<br><br>

To cite an online recording, use the URL from the specimen record page. This URL is a stable globally unique identifier, or GUID, and also approximates the format for a life science identifier(LSID): <br><br>

institution_collection_catalog# <br>
(e.g. macaulaylibrary.org/video/12345).<br><br>

The long url form should not be used. <br>
(e.g. macaulaylibrary.org/video/12345/cardinal-new-york-2011).<br><br>

For more information: http://macaulaylibrary.org/cite-recordings doi:10.15468/ckcdpy
Carnegie Museum of Natural History Birds Collection doi:10.15468/dv1ojv
GEO-Tag der Artenvielfalt: BIRDRACE Mehr Seh Team
SBMNH Vertebrate Collection doi:10.15468/amfnkq
(see website)
National Museum of Natural History Luxembourg Recorder database
Cowan Tetrapod Collection at the University of British Columbia Beaty Biodiversity Museum (UBCBBM) doi:10.15468/aytqsu
Senckenberg: Collection Aves (bird skins) SMF
GEO-Tag der Artenvielfalt: BIRDRACE Die Wendehälse
BeBIF Provider: University of Ghent - Zoology Museum - Vertebratacollectie
Research Institute for Nature and Forest (INBO). Watervogels - Wintering waterbirds in Flanders, Belgium. Online at http://dataset.inbo.be/watervogels-occurrences. Published on 2014-11-26. GBIF key: 7f9eb622-c036-44c6-8be9-5793eaa1fa1e, http://www.gbif.org/dataset/7f9eb622-c036-44c6-8be9-5793eaa1fa1e doi:10.15468/lj0udq
GEO-Tag der Artenvielfalt: BIRDRACE Nord-Seh-Team
UK National Biodiversity Network: North & East Yorkshire Ecological Data Centre - North and East Yorkshire Ecological Data Centre - Non-sensitive Records from all taxonomic groups. 
GEO-Tag der Artenvielfalt: Gesamtartenliste Bremerhaven, Helgoland und Sylt
UMMZ Bird Collection doi:10.15468/lns1qm
National Museum of Nature and Science, Japan: Ibaraki Nature Museum, Birds collection
2013. EOD - eBird Observation Dataset.
naturgucker.de: naturgucker doi:10.15468/uc1apo
GEO-Tag der Artenvielfalt: BIRDRACE Oostfreesland Bird-Lopers
UK National Biodiversity Network: South East Wales Biodiversity Records Centre - CCW Regional Data : South East Wales Non-sensitive Species Records
CUMV Bird Collection doi:10.15468/fyugn7
Korea Institute of Science and Technology Information: Birds (KIDR-BI)
National Museum of Nature and Science, Japan: Bird Specimens in the Museum of Nature and Human Activities, Hyogo, Japan
GEO-Tag der Artenvielfalt: BIRDRACE Asiola-Quartett
UK National Biodiversity Network: National Trust - Wicken Fen nature reserve species data held by The National Trust
National Science Museum of Korea: Birds (NSMK-BI)
Natural History Museum, University of Oslo: Bird skin collection, Natural History Museum, University of Oslo doi:10.15468/ex7wmt
SPN - Service du Patrimoine naturel, Muséum national d'Histoire naturelle, Paris: Inventaire National du Patrimoine Naturel : Oiseaux hivernants de France
Jagiellonian University, Institute of Zoology: Carabidae of the Carpathians
UK National Biodiversity Network: Sheffield Biological Records Centre - Sheffield Biological Records Centre- Non-sensitive Records from all taxonomic groups. 
GEO-Tag der Artenvielfalt: BIRDRACE Dithmarscher Deichhühner
Natural History Museum Rotterdam: Natural History Museum Rotterdam (NL) - Chordata collection
GBIF-Sweden: Lund Museum of Zoology (MZLU) doi:10.15468/mw39rb
Naturalis Biodiversity Center: Zoological Museum Amsterdam, University of Amsterdam (NL) - Aves
South Australian Museum: South Australian Museum Australia provider for OZCAM
GEO-Tag der Artenvielfalt: BIRDRACE Cuxland - Schwenke Geo Consult
Center for Macroecology, Evolution and Climate, University of Copenhagen: Western Palearctic migratory birds in continental Africa
Field Museum: Field Museum of Natural History (Zoology) Bird Egg Collection doi:10.15468/uqsgv2
Museum of Vertebrate Zoology (MVZ), University of California, Berkeley doi:10.15468/r1woj3
University Museum of Zoology Cambridge, UMZC doi:10.15468/pjmjvn
National Biodiversity Data Centre: The First Atlas of Wintering Birds in Britain and Ireland: 1981/82-1983/84.
GEO-Tag der Artenvielfalt: Schatzinsel Norderney
Musee de la Valle: Caire-Chabrand Collection
National Museum of Nature and Science, Japan: Birds collection of Yamashina Institute for Ornithology
Birdlife Finland: Tiira information service
Musée Zoologique de la Ville de Strasbourg: Aves MZS
Field Museum: Field Museum of Natural History (Zoology) Bird Collection doi:10.15468/exkxdx
Museum and Institute of Zoology, Polish Academy of Sciences: Bird Collection of Museum and Institute of Zoology PAS
GBIF-Sweden: Zoology (Museum of Evolution - Uppsala)
GEO-Tag der Artenvielfalt: Birdrace_Dith_MarshSandpiper-Dithmarschen
UK National Biodiversity Network: EcoRecord - Bird records held by EcoRecord for the Birmingham and the Black Country area collated prior to March 2013
Avifaunal records of Bhumesh Singh Bhadouria, Wildlife Institute of India, Contributed by: Vinod.B. Mathur, K.Sivakumar, Anoop K.R., BholuAbrar Khan, GautamTalukdar, Dinesh Singh Pundir., Bhadouria, et.al., 2015: Records of Avifauna of Wetlands around Keoladeo National Park, Bharatpur
Senckenberg: Collection Aves (spirit preserved) SMF
Musee Vert, Museum d'Histoire Naturelle du Mans: Musée Vert ornithology collection
Yale University Peabody Museum: Vertebrate Zoology Division - Ornithology, Yale Peabody Museum doi:10.15468/h25uz7
Academy of Natural Sciences: ORN
The Norwegian Biodiversity Information Centre (NBIC): Norwegian Species Observation Service
GEO-Tag der Artenvielfalt: Birdrace-Ornis_im_Einsatz-Lahn-Dill-Kreis
PSM Collection doi:10.15468/3oaz5o
Israel Nature & Parks Authority (Ed.) 1970 - (continuously updated): Vertebrate and vascular plant observations of the Israel Nature and Parks Authority.
GEO-Tag der Artenvielfalt: BIRDRACE Dith Marsh Sandpiper
GEO-Tag der Artenvielfalt: Birdrace-Team_Wangerooge-Friesland
MCNB Chordate GBIF online database (date when consulted)
UK National Biodiversity Network: Humber Environmental Data Centre - Humber Environmental Data Centre - Non Sensitive Records from all taxonomic groups
GEO-Tag der Artenvielfalt: Birdrace-Nord_Seh_Team-Nordfriesland
Col. EEZA Estación Experimental de Zonas Áridas (CSIC), Almería Estación Experimental de Zonas Áridas (CSIC), Almería
GEO-Tag der Artenvielfalt: Birdrace-Cuxland_Schwenke_GeoConsult-Cuxhaven
Museum George Sand et de la Vallee Noire: Baillon Collection
Sujit Narwade, Mohit Kalra, Rajkumar Jagdish, Divya Varier, Sagar Satpute, Gautam Talukdar (2011), Collaborative work of Environmental Information System (ENVIS) Centre and Important Bird Areas Programmes-Indian Bird Conservation Network (IBA-IBCN) projects of the BNHS, India, Zookeys, Narwade, S., et al (2011): Literature based species occurrence data of birds of North-east India.
Chavan, VIshwas and C. T. Achuthankutty (editors), IndOBIS Catalogue of Life, Available at http://www.indobis.org/, Retrived day, date, year
Kunsan Passage Bird Research Institute: Birds (GMBO-BI)
Martí, R. y Del Moral, J. C. (eds). 2003. Atlas de las Aves Reproductoras de España. Dirección General de Conservación de la Naturaleza-Sociedad española de Ornitología. Madrid, 733 pp.
LSUMZ Bird Collection
Western Foundation of Vertebrate Zoology (WFVZ) doi:10.15468/hqrtbv
SPN - Service du Patrimoine naturel, Muséum national d'Histoire naturelle, Paris: Inventaire National du Patrimoine Naturel : Oiseaux nicheurs de France
GEO-Tag der Artenvielfalt: Birdrace-Alte_Socken-Cuxhaven
UK National Biodiversity Network: Greater Manchester Ecology Unit - Bird Records held by Greater Manchester Ecology Unit
UK National Biodiversity Network: Wiltshire and Swindon Biological Records Centre - Wiltshire & Swindon Site-based Survey Records
GEO-Tag der Artenvielfalt: BIRDRACE Avinauten
UK National Biodiversity Network: Suffolk Biological Records Centre - Suffolk Biological Records Centre (SBRC) dataset
Natural History Museum of Los Angeles County: LACM Vertebrate Collection doi:10.15468/77rmwd
Gothenburg Natural History Museum (GNM): Vertebrates of the Gothenburg Natural History Museum (GNM)
Biologiezentrum Linz Oberoesterreich: Biologiezentrum Linz
Korea Institute of Environmental Ecology: Birds (KIEE-BI)
Korean Wild Bird Society: Korean Wild Birds
MNHN - Museum national d'Histoire naturelle: Birds collection (ZO) of the Muséum national d'Histoire Naturelle (MNHN - Paris) doi:10.15468/h0xtwv
ArtDatabanken: Artdata doi:10.15468/kllkyl
BeBIF Provider: rmca-albertine-rift-birds
AMNH Bird Collection
GEO-Tag der Artenvielfalt: Schatzinsel Wangerooge
San Diego Natural History Museum Birds Collection (SDNHM) doi:10.15468/dot7ae
Korea Institute of Science and Technology Information: Korea Bird Distribution Atlas Database
Senckenberg: Collection Ornithologie - SNSD
Museum für Naturkunde Berlin: ArtenFinder
GEO-Tag der Artenvielfalt: BIRDRACE Unterste Niederrhein-Rennvögel
Museum für Naturkunde Berlin: Animal Sound Archive
National Museum of Natural History, Smithsonian Institution: NMNH occurrence DwC-A doi:10.15468/dipjcr
Royal Ontario Museum: Ornithology Collection Non Passeriformes - Royal Ontario Museum
UK National Biodiversity Network: The Scottish Ornithologists' Club - Fife non-breeding bird 5km atlas 1991-99
Finnish Museum of Natural History: Fieldjournal.org observation database
National Biodiversity Data Centre: Birds of Ireland doi:10.15468/y20bzm
Taiwan Biodiversity Information Facility (TaiBIF): Bird Observation Data
Upper Silesian Museum, Bytom: Upper Silesian Museum, Bird Observations
Folklore and Natural History Museum: Birds (JNHM-BI)
UK National Biodiversity Network: Bristol Regional Environmental Records Centre - BRERC October 2009
How you want your data cited
GEO-Tag der Artenvielfalt: Artenvielfalt der Nordsee - Bremerhaven (Dorum-Neufeld)
Natural History Museum (2015): Collection specimens data.nhm.ac.uk., http://dx.doi.org/10.5519/0002965 doi:10.5519/0002965
GEO-Tag der Artenvielfalt: BIRDRACE Turbine Untersee
California Academy of Sciences: CAS Ornithology (ORN) doi:10.15468/ozz2u5
UK National Biodiversity Network: Merseyside BioBank - North Merseyside Birds (verified)
Museum of Comparative Zoology, Harvard University: Museum of Comparative Zoology, Harvard University doi:10.15468/p5rupv
Biological Station of Doñana (CSIC): Estacion Biologica Donana - CSIC, Aves
National Biodiversity Data Centre: Irish Wetland Birds Survey (I-WeBS) 1994-2001.
UK National Biodiversity Network: National Trust - Heigham Holmes species data held by The National Trust
National Museum of Nature and Science, Japan: Bird collection of National Museum of Nature and Science
Senckenberg: Collection Aves (bird skeletons) SMF
Royal Ontario Museum: Palaeobiology - Vertebrate Fossils Collection - Non Mammalia - Royal Ontario Museum