Dyfyniad APA
ebrary, Inc. (2001). Nutrient requirements of dairy cattle (7th rev. ed.). National Academy Press.
Dyfyniad Arddull Chicago
ebrary, Inc. Nutrient Requirements of Dairy Cattle. 7th rev. ed. Washington, D.C.: National Academy Press, 2001.
Dyfyniad MLA
ebrary, Inc. Nutrient Requirements of Dairy Cattle. 7th rev. ed. National Academy Press, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.