Cita APA

Botkin, D. B., & Keller, E. A. (2011). Environmental science: Earth as a living planet (8th ed.). Wiley.

Chicago Edition Citation

Botkin, Daniel B., i Edward A. Keller. Environmental Science: Earth as a Living Planet. 8th ed. Hoboken, NJ: Wiley, 2011.

Cita MLA

Botkin, Daniel B., i Edward A. Keller. Environmental Science: Earth as a Living Planet. 8th ed. Wiley, 2011.