Cita APA (7th ed.)
Cunningham, W. P., & Saigo, B. W. (1997). Environmental science: A global concern (4th ed.). WCB McGraw-Hill.
Cita Chicago (17th ed.)
Cunningham, William P., i Barbara Woodworth Saigo. Environmental Science: A Global Concern. 4th ed. Boston: WCB McGraw-Hill, 1997.
Cita MLA (9th ed.)
Cunningham, William P., i Barbara Woodworth Saigo. Environmental Science: A Global Concern. 4th ed. WCB McGraw-Hill, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.