Cita APA (7th ed.)

Cunningham, W. P., & Saigo, B. W. (1999). Environmental science: A global concern (5th ed.). WCB/McGraw-Hill.

Cita Chicago (17th ed.)

Cunningham, William P., i Barbara Woodworth Saigo. Environmental Science: A Global Concern. 5th ed. Boston: WCB/McGraw-Hill, 1999.

Cita MLA (9th ed.)

Cunningham, William P., i Barbara Woodworth Saigo. Environmental Science: A Global Concern. 5th ed. WCB/McGraw-Hill, 1999.