APA (7e ed.) Bronvermelding

Botkin, D. B., & Keller, E. A. (1995). Environmental science: Earth as a living planet. Wiley.

Chicago (17e ed.) Bronvermelding

Botkin, Daniel B., en Edward A. Keller. Environmental Science: Earth as a Living Planet. New York: Wiley, 1995.

MLA (9e ed.) Bronvermelding

Botkin, Daniel B., en Edward A. Keller. Environmental Science: Earth as a Living Planet. Wiley, 1995.