Não informado. (2002). Sheep & goat research journal. National Institute for Animal Agriculture.
Chicago-referens (17:e uppl.)Não informado. Sheep & Goat Research Journal. Englewood, Colo: National Institute for Animal Agriculture, 2002.
MLA-referens (8:e uppl.)Não informado. Sheep & Goat Research Journal. National Institute for Animal Agriculture, 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.