APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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