APA (7th ed.) Citation

Enger, E. D., & Kormelink, J. R. (1991). Concepts in biology (6th ed.). WCB.

Chicago Style (17th ed.) Citation

Enger, Eldon D., and J. Richard Kormelink. Concepts in Biology. 6th ed. Boulevard: WCB, 1991.

MLA (9th ed.) Citation

Enger, Eldon D., and J. Richard Kormelink. Concepts in Biology. 6th ed. WCB, 1991.