APA引文

Cunningham, W. P., & Cunningham, M. A. (2004). Principles of environmental science: Inquiry and applications (2nd ed.). McGraw-Hill Companies, Inc.

芝加哥风格引文

Cunningham, William P., 与 Mary Ann Cunningham. Principles of Environmental Science: Inquiry and Applications. 2nd ed. New York: McGraw-Hill Companies, Inc, 2004.

MLA引文

Cunningham, William P., 与 Mary Ann Cunningham. Principles of Environmental Science: Inquiry and Applications. 2nd ed. McGraw-Hill Companies, Inc, 2004.