APA (7th ed.) Citation

Clegg, A. G., & Clegg, P. C. (1963). Biology of the mammal. Heinemann.

Chicago Style (17th ed.) Citation

Clegg, Arthur G., and Patricia Catherine Clegg. Biology of the Mammal. London: Heinemann, 1963.

MLA (9th ed.) Citation

Clegg, Arthur G., and Patricia Catherine Clegg. Biology of the Mammal. Heinemann, 1963.