APA-viite

Keller, E. A. (2011). Environmental geology (Ninth.). Pearson Prentice Hall.

Chicago-tyylinen lähdeviittaus

Keller, Edward A. Environmental Geology. Ninth. Upper Saddle River, N.J.: Pearson Prentice Hall, 2011.

MLA-viite

Keller, Edward A. Environmental Geology. Ninth. Pearson Prentice Hall, 2011.