APA引文

Cunningham, W. P., & Cunningham, M. A. 1. 1. (2012). Environmental science: A global concern (Twelfth ed.). New York: McGraw-Hill Companies, Inc.

Trích dẫn kiểu Chicago

Cunningham, William P., và Mary Ann. 1963- 1945- Cunningham. Environmental Science: A Global Concern. Twelfth ed. New York: McGraw-Hill Companies, Inc, 2012.

MLA引文

Cunningham, William P., và Mary Ann. 1963- 1945- Cunningham. Environmental Science: A Global Concern. Twelfth ed. New York: McGraw-Hill Companies, Inc, 2012.