APA ציטוט

Cunningham, W. P. (2012). Environmental science: A global concern. New York: McGraw-Hill.

Trích dẫn kiểu Chicago

Cunningham, William P. Environmental Science: A Global Concern. New York: McGraw-Hill, 2012.

ציטוט MLA

Cunningham, William P. Environmental Science: A Global Concern. New York: McGraw-Hill, 2012.