Tham khảo Vịt Orpington

Breed Classification. Poultry Club of Great Britain. Truy cập August 2014.
The Poultry Club of Great Britain: Orpington
Holderread, Dave (2001). Storey's Guide to Raising Ducks. North Adams, MA, USA: Storey Publishing. pp. 60, 61.
Cook,W.(1897) The Poultry Journal. p. 81-82
http://poultrykeeper.com/duck-breeds/orpington-ducks
Standard Revision Committee; Malone, Pat; Donnelly, Gerald; Leonard, Walt (2001). American Standard of Perfection. USA: American Poultry Association. p. 313.
http://www.albc-usa.org/cpl/waterfowl/buffduck.html
http://www.feathersite.com/Poultry/Ducks/Buffs/BRKBuff.html
Cook, William.(1897)The Poultry Journal No.138, Vol.12,p. 81-82.

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