Cita APA (7a ed.)

Botkin, D. B., & Keller, E. A. (2007). Environmental science: Earth as a living planet (6th ed.). Wiley.

Cita Chicago Style (17a ed.)

Botkin, Daniel B., y Edward A. Keller. Environmental Science: Earth as a Living Planet. 6th ed. Hoboken, NJ ; New Delhi: Wiley, 2007.

Cita MLA (8a ed.)

Botkin, Daniel B., y Edward A. Keller. Environmental Science: Earth as a Living Planet. 6th ed. Wiley, 2007.