APA (7th ed.) Citation

Keller, E. A. (2012). Introduction to environmental geology (5th ed.). Prentice Hall.

Chicago Style (17th ed.) Citation

Keller, Edward A. Introduction to Environmental Geology. 5th ed. Upper Saddle River, NJ: Prentice Hall, 2012.

MLA (9th ed.) Citation

Keller, Edward A. Introduction to Environmental Geology. 5th ed. Prentice Hall, 2012.