Tham khảo Vịt bạc Appleyard

  1. 1 2 Barbara Rischkowsky, D. Pilling (eds.) (2007). List of breeds documented in the Global Databank for Animal Genetic Resources, annex to The State of the World's Animal Genetic Resources for Food and Agriculture. Rome: Food and Agriculture Organization of the United Nations. ISBN 9789251057629. Accessed January 2017.
  2. 1 2 Victoria Roberts (2008). British poultry standards: complete specifications and judging points of all standardized breeds and varieties of poultry as compiled by the specialist breed clubs and recognised by the Poultry Club of Great Britain. Oxford: Blackwell. ISBN 9781405156424.
  3. ↑ APA Recognized Breeds and Varieties: As of January 1, 2012. American Poultry Association. Archived 4 November 2017.
  4. ↑ Liste des races et variétés homologuée dans les pays EE (28.04.2013). Entente Européenne d’Aviculture et de Cuniculture. Archived 16 June 2013.
  5. ↑ Breed Classification. Poultry Club of Great Britain. Archived 30 June 2017.
  6. ↑ Breed data sheet: Appleyard/United Kingdom. Domestic Animal Diversity Information System of the Food and Agriculture Organization of the United Nations. Accessed March 2017.
  7. ↑ Silver Appleyard Duck. The Livestock Conservancy. Accessed March 2017.
  8. 1 2 Heavy ducks. British Waterfowl Association. Accessed March 2017.
  9. ↑ Silver Appleyard. Rare Breeds Survival Trust. Accessed March 2017.
  10. ↑ Chris Ashton, Mike Ashton (2001). The Domestic Duck. Ramsbury, Marlborough: The Crowood Press. ISBN 9781847979704.
  11. ↑ Breed Gallery: Ducks. Poultry Club of Great Britain. Accessed March 2017.

Tài liệu tham khảo

WikiPedia: Vịt bạc Appleyard ftp://ftp.fao.org/docrep/fao/010/a1250e/a1250e.pdf ftp://ftp.fao.org/docrep/fao/010/a1250e/annexes/Li... http://dad.fao.org/cgi-bin/EfabisWeb.cgi?sid=f74fb... http://livestockconservancy.org/index.php/heritage... http://www.poultryclub.org/breed-gallery/ducks/ http://www.rbst.org.uk/Rare-and-Native-Breeds/Poul... http://www.waterfowl.org.uk/hvducks.html https://books.google.com/books?id=nAfyUHY42u0C https://books.google.it/books?id=asIoCAAAQBAJ&pg=P... https://web.archive.org/web/20130616062803/http://...