APA (7th ed.) Citation

Raven, P. . H. (1991). Understanding biology (2nd ed.). Wm. C. Brown.

Chicago Style (17th ed.) Citation

Raven, Peter H. Understanding Biology. 2nd ed. Dubuque: Wm. C. Brown, 1991.

MLA (9th ed.) Citation

Raven, Peter H. Understanding Biology. 2nd ed. Wm. C. Brown, 1991.