Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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