APA (7th ed.) Citation

Thain, M., & Hickman, M. (2004). The Penguin dictionary of biology (11nd ed.). Penguin books.

Chicago Style (17th ed.) Citation

Thain, M., and M. Hickman. The Penguin Dictionary of Biology. 11nd ed. London: Penguin books, 2004.

MLA (8th ed.) Citation

Thain, M., and M. Hickman. The Penguin Dictionary of Biology. 11nd ed. Penguin books, 2004.