National Research Council (USA) Committee on Animal Nutrition. (1989). Nutrient requirements of dairy cattle (6., rev. ed., 4. print.). National Acad. Press.
Chicago-Zitierstil (17. Ausg.)National Research Council (USA) Committee on Animal Nutrition. Nutrient Requirements of Dairy Cattle. 6., rev. ed., 4. print. Washington: National Acad. Press, 1989.
MLA-Zitierstil (9. Ausg.)National Research Council (USA) Committee on Animal Nutrition. Nutrient Requirements of Dairy Cattle. 6., rev. ed., 4. print. National Acad. Press, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.