Cita APA (7a ed.)

Cunningham, W. P., & Cunningham, M. A. (2006). Principles of environmental science: Inquiry and applications (3rd ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Cunningham, William P., y Mary Ann Cunningham. Principles of Environmental Science: Inquiry and Applications. 3rd ed. Dubuque: McGraw-Hill, 2006.

Cita MLA (9a ed.)

Cunningham, William P., y Mary Ann Cunningham. Principles of Environmental Science: Inquiry and Applications. 3rd ed. McGraw-Hill, 2006.