Cita APA (7a ed.)

Cunningham, W. P., Cunningham , M. A., & Woodworth , B. (2003). Environmental science: A global concern (7th ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Cunningham, William P., Mary Ann Cunningham , y Barbara Woodworth. Environmental Science: A Global Concern. 7th ed. New York: McGraw-Hill, 2003.

Cita MLA (9a ed.)

Cunningham, William P., et al. Environmental Science: A Global Concern. 7th ed. McGraw-Hill, 2003.