Cita APA (7th ed.)

Enger, E. D. (1997). Concepts in Biology (10th ed.). McGraw-Hill Higher.

Cita Chicago (17th ed.)

Enger, Eldon D. Concepts in Biology. 10th ed. New York: McGraw-Hill Higher, 1997.

Cita MLA (9th ed.)

Enger, Eldon D. Concepts in Biology. 10th ed. McGraw-Hill Higher, 1997.