APA (7th ed.) Citation

Keller, E. A. (2011). Environmental geology (9. ed.). Prentice Hall.

Chicago Style (17th ed.) Citation

Keller, Edward A. Environmental Geology. 9. ed. Boston [u.a.]: Prentice Hall, 2011.

MLA (9th ed.) Citation

Keller, Edward A. Environmental Geology. 9. ed. Prentice Hall, 2011.