Rujukan Biri-biri

  1. ↑ Budiansky, pp. 97–98.
  2. ↑ Budianksy, pp. 100–01.
  3. 1 2 Ensminger
  4. 1 2 "Natural Colored Sheep". Rare Breeds Watchlist. Rocky Mountain Natural Colored Sheep Breeders Association. January 2007. Dicapai 2008-01-05. 
  5. 1 2 "An introduction to coloured sheep". British Coloured Sheep Breeders Association. Diarkibkan daripada asal pada 2007-11-10. Dicapai 2008-01-05. 
  6. 1 2 Weaver
  7. 1 2 3 4 Simmons & Ekarius
  8. ↑ Melinda J. Burrill Ph.D. Professor Coordinator of Graduate Studies, Department of Animal and Veterinary Sciences, California State Polytechnic University (2004). Sheep. World Book. Mackiev. Selenggaraan CS1: Pelbagai nama: senarai pengarang (link)
  9. ↑ Frandson, R. D. and T. L. Spurgeon. 1992. Anatomy and physiology of farm animals. 5th ed. Lippincott, Williams and Wilkins.
  10. ↑ "Dental Anatomy of Ruminants from Colorado State University". Vivo.colostate.edu. 2001-11-07. Dicapai 2014-04-14. 
  11. ↑ Schoenian, Susan. "Sheep Basics". Sheep101.info. Dicapai 2007-11-27. 
  12. 1 2 Smith et al.
  13. ↑ Smith et al., p. 5.
  14. ↑ Shulaw, Dr. William P. (2006). "Sheep Care Guide". American Sheep Industry Association. Dicapai 2008-09-08. 
  15. ↑ Terrill, C. E.; Hazel, L. N. (1946). "Heritability of neck folds and face covering in range Rambouillet lambs as evaluated by scoring". J. Anim. Sci. 5: 170–179. 
  16. ↑ Brown, Dave; Sam Meadowcroft (1996). The Modern Shepherd. Wharfedale Road, Ipswich 1P1 4LG, United Kingdom: Farming Press. ISBN 0-85236-188-2. 
  17. 1 2 Smith et al., p. 4.
  18. ↑ Ensminger
  19. ↑ "Sheep (Ovis aries)". Breeds of Livestock. Oklahoma State University Dept. of Animal Science. Dicapai 2007-11-02. 
  20. ↑ Cathy M. Dwyer (31 July 2008). The Welfare of Sheep. シュプリンガー・ジャパン株式会社. m/s. 56–. ISBN 978-1-4020-8552-9. Dicapai 15 October 2010. 
  21. ↑ Per Jensen (2009). The ethology of domestic animals: an introductory text. CABI. m/s. 162–. ISBN 978-1-84593-536-8. Dicapai 15 October 2010. 
  22. ↑ Weaver
  23. 1 2 Smith et al.
  24. ↑ Maijala, K. 1997, Genetic aspects of domestication, common breeds and their origin. In: Piper, L. and A. Ruvinsky (eds.). The genetics of sheep. CABI
  25. ↑ Scherf, B. D. 2000. World watch list for domestic animal diversity. 3rd Edition. FAO, Rome
  26. ↑ FAO. 2007. State of the world's animal genetic resources for food and agriculture
  27. ↑ Brown, Dave; Sam Meadowcroft (1996). The Modern Shepherd. Wharfedale Road, Ipswich 1P1 4LG, United Kingdom: Farming Press. ISBN 0-85236-188-2. 
  28. ↑ D’Arcy, J.B., Sheep Management & Wool Technology, NSW University Press, 1986, ISBN 0-86840-106-4
  29. 1 2 3 Wooster
  30. ↑ Pulina, Giuseppe; Roberta Bencini (2004). Dairy Sheep Nutrition. CABI Publishing. ISBN 0-85199-595-0. 
  31. ↑ Pulina et al. p. 2.
  32. ↑ Rare Breeds Survival Trust (UK) (January 2008). "Sheep". Rare Breeds Watchlist. Diarkibkan daripada asal pada June 22, 2008. Dicapai 2008-09-07. 
  33. ↑ Rare Breeds Survival Trust (UK) (2008). "Watchlist". A numerical guide to the 2008 Watchlist categories. Diarkibkan daripada asal pada July 31, 2008. Dicapai 2008-09-07. 
  34. ↑ "Conservation Priority List", livestockconservancy.org, The Livestock Conservancy, dicapai 2013-09-03