Cita APA

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

Citación estilo Chicago

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

Cita MLA

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