APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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