APA (7e ed.) Bronvermelding

Botkin, D. B., & Keller, E. A. (2010). Environmental science: Earth as a living planet (7th ed.). John Wiley & Sons.

Chicago (17e ed.) Bronvermelding

Botkin, Daniel B., en Edward A. Keller. Environmental Science: Earth as a Living Planet. 7th ed. Hoboken, N.J: John Wiley & Sons, 2010.

MLA (8e ed.) Bronvermelding

Botkin, Daniel B., en Edward A. Keller. Environmental Science: Earth as a Living Planet. 7th ed. John Wiley & Sons, 2010.