APA-referens (7:e uppl.)

Botkin, D. B., & Keller, E. A. (2011). Environmental science: Earth as a living planet (7th ed.). Wiley.

Chicago-referens (17:e uppl.)

Botkin, Daniel B., och Edward A. Keller. Environmental Science: Earth as a Living Planet. 7th ed. Hoboken, N.J: Wiley, 2011.

MLA-referens (9:e uppl.)

Botkin, Daniel B., och Edward A. Keller. Environmental Science: Earth as a Living Planet. 7th ed. Wiley, 2011.