APA引文

Cunningham, W. P. (2001). Environmental science: A global concern (6th edition.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Cunningham, William P. Environmental Science: A Global Concern. 6th edition. New York: McGraw-Hill, 2001.

MLA引文

Cunningham, William P. Environmental Science: A Global Concern. 6th edition. McGraw-Hill, 2001.