APA (7th ed.) Citation

Gardner, E. J. (1968). History of biology (2. ed., 4. pr.). Burgess.

Chicago Style (17th ed.) Citation

Gardner, Eldon J. History of Biology. 2. ed., 4. pr. Minneapolis: Burgess, 1968.

MLA (9th ed.) Citation

Gardner, Eldon J. History of Biology. 2. ed., 4. pr. Burgess, 1968.