Dyfyniad APA
National Research Council (U.S.). Committee on Animal Nutrition & ebrary, Inc. (1989). Nutrient requirements of horses (5th rev. ed.). National Academy Press.
Dyfyniad Arddull Chicago
National Research Council (U.S.). Committee on Animal Nutrition and Inc ebrary. Nutrient Requirements of Horses. 5th rev. ed. Washington, D.C.: National Academy Press, 1989.
Dyfyniad MLA
National Research Council (U.S.). Committee on Animal Nutrition and Inc ebrary. Nutrient Requirements of Horses. 5th rev. ed. National Academy Press, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.