APA (7th ed.) Citation

Keller, E. A. (1996). Environmental geology (7th ed.). Prentice-Hall.

Chicago Style (17th ed.) Citation

Keller, Edward A. Environmental Geology. 7th ed. Upper Saddle River, N.J: Prentice-Hall, 1996.

MLA (9th ed.) Citation

Keller, Edward A. Environmental Geology. 7th ed. Prentice-Hall, 1996.