National Research Council (Estados Unidos). Subcommittee on Sheep Nutrition, & National Research Council (Estados Unidos). Subcommittee on Sheep Nutrition. (1975). Nutrient requirements of sheep (5. rev. edition.). Washington: National Academy of Sciences.
Chicago Style CitationNational Research Council (Estados Unidos). Subcommittee on Sheep Nutrition, and National Research Council (Estados Unidos). Subcommittee on Sheep Nutrition. Nutrient Requirements of Sheep. 5. rev. edition. Washington: National Academy of Sciences, 1975.
MLA CitationNational Research Council (Estados Unidos). Subcommittee on Sheep Nutrition, and National Research Council (Estados Unidos). Subcommittee on Sheep Nutrition. Nutrient Requirements of Sheep. 5. rev. edition. Washington: National Academy of Sciences, 1975.