APA (7th ed.) Citation

Gray, P. (1968). The dictionary of the biological sciences (2. print.). Reinhold.

Chicago Style (17th ed.) Citation

Gray, Peter. The Dictionary of the Biological Sciences. 2. print. New York: Reinhold, 1968.

MLA (9th ed.) Citation

Gray, Peter. The Dictionary of the Biological Sciences. 2. print. Reinhold, 1968.