Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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