Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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