Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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