APA (7th ed.) Citation

Keller, E. A. (1992). Environmental geology. Macmillan.

Chicago Style (17th ed.) Citation

Keller, Edward A. Environmental Geology. New York: Macmillan, 1992.

MLA (9th ed.) Citation

Keller, Edward A. Environmental Geology. Macmillan, 1992.

Warning: These citations may not always be 100% accurate.