Cita APA (7th ed.)

Cunningham, W. P., & Cunningham, M. A. (2008). Principles of Environmental Science: Inquiry & Applications (4th ed.). Tata McGraw-Hill.

Cita Chicago (17th ed.)

Cunningham, William P., i Mary Ann Cunningham. Principles of Environmental Science: Inquiry & Applications. 4th ed. New Delhi: Tata McGraw-Hill, 2008.

Cita MLA (9th ed.)

Cunningham, William P., i Mary Ann Cunningham. Principles of Environmental Science: Inquiry & Applications. 4th ed. Tata McGraw-Hill, 2008.