एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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