APA استشهاد

Botkin, D. B., & Keller, E. A. (2000). Environmental science : earth as a living planet: : 3rd ed (3rd ed.). John Wiley.

استشهاد بنمط شيكاغو

Botkin, Daniel B., و Edward A. Keller. Environmental Science : Earth as a Living Planet: : 3rd Ed. 3rd ed. New York: John Wiley, 2000.

MLA استشهاد

Botkin, Daniel B., و Edward A. Keller. Environmental Science : Earth as a Living Planet: : 3rd Ed. 3rd ed. John Wiley, 2000.