Cita APA

Hamblin, W. K., & Howard, J. D. (2005). Excercises in Physical Geology (twelfth edition.). Pearson Pentrice Hall Inc..

Citación estilo Chicago

Hamblin, William Kenneth, and James D. Howard. Excercises in Physical Geology. twelfth edition. Upper Saddle River, NJ., USA: Pearson Pentrice Hall Inc., 2005.

Cita MLA

Hamblin, William Kenneth, and James D. Howard. Excercises in Physical Geology. twelfth edition. Pearson Pentrice Hall Inc., 2005.