APA
(1975). National Research Council. Subcommitee on sheep. Nutrient requirements of sheep. Washington, DC: National Academy of Sciences.
Chicago
1975. National Research Council. Subcommitee on sheep. Nutrient requirements of sheep. Washington, DC: National Academy of Sciences.
Harvard
(1975). National Research Council. Subcommitee on sheep. Nutrient requirements of sheep. Washington, DC: National Academy of Sciences.
MLA
National Research Council. Subcommitee on sheep. Nutrient requirements of sheep. Washington, DC: National Academy of Sciences. 1975.