APA ציטוט

Cunningham, W. P. (2003). Environmental science: A global concern. Boston: McGraw-Hill.

Trích dẫn kiểu Chicago

Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill, 2003.

ציטוט MLA

Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill, 2003.