Dyfyniad APA

Hyndman, D. W. (1972). Petrology of igneous and metamorphic rocks. McGraw Hill Bk Co.

Dyfyniad Arddull Chicago

Hyndman, Donald W. Petrology of Igneous and Metamorphic Rocks. N.York: McGraw Hill Bk Co, 1972.

Dyfyniad MLA

Hyndman, Donald W. Petrology of Igneous and Metamorphic Rocks. McGraw Hill Bk Co, 1972.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.