APA (7th ed.) Citation

Ørskov, E. R., & Ryle, M. (1990). Energy nutrition in ruminants. Elsevier.

Chicago Style (17th ed.) Citation

Ørskov, E. R., and Margaret Ryle. Energy Nutrition in Ruminants. London ; New York: Elsevier, 1990.

MLA (9th ed.) Citation

Ørskov, E. R., and Margaret Ryle. Energy Nutrition in Ruminants. Elsevier, 1990.