Hamblin, W. K., & Howard, J. D. (2005). Excercises in Physical Geology (twelfth edition.). Pearson Pentrice Hall Inc..
Chicagoスタイル(17版)引用形式Hamblin, William Kenneth, , James D. Howard. Excercises in Physical Geology. twelfth edition. Upper Saddle River, NJ., USA: Pearson Pentrice Hall Inc., 2005.
MLA(9版)引用形式Hamblin, William Kenneth, , James D. Howard. Excercises in Physical Geology. twelfth edition. Pearson Pentrice Hall Inc., 2005.
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