Ehlers, E. G. (1982). Petrology: Igneous, Sedimentary, and Metamorphic. W. H. Freeman and Company.
Chicagoスタイル(17版)引用形式Ehlers, Ernest G. Petrology: Igneous, Sedimentary, and Metamorphic. San Francisco: W. H. Freeman and Company, 1982.
MLA(9版)引用形式Ehlers, Ernest G. Petrology: Igneous, Sedimentary, and Metamorphic. W. H. Freeman and Company, 1982.
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