Cunningham, W. P., & Cunningham, M. A. (2012). Environmental science: A global concern (12th ed.). McGraw-Hill Companies, Inc.
Čikaški stil citiranja (17. izdanje)Cunningham, William P., i Mary Ann Cunningham. Environmental Science: A Global Concern. 12th ed. New York: McGraw-Hill Companies, Inc, 2012.
MLA način citiranja (9. izdanje)Cunningham, William P., i Mary Ann Cunningham. Environmental Science: A Global Concern. 12th ed. McGraw-Hill Companies, Inc, 2012.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.