Provedení ISO 639-5 Codes for the representation of names of languages - Part 5: Alpha-3 code for language families and groups (2011)

Library of Congress. ISO 639-5 Codes for the representation of names of languages - Part 5: Alpha-3 code for language families and groups [online]. Washington (D.C.): The Library of Congress, modified 2011-05-12 [cit. 2014-03-18]. Library of Congress Linked Data Service. Authorities and Vocabularies. Dostupné z (URI): http://id.loc.gov/vocabulary/iso639-5 nebo http://id.loc.gov/vocabulary/iso639-5.html.