Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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