Dyfyniad APA

G.W.Tyrrell. (2006). Principles of Petrology: An Introduction to the Science of Rocks. Surjeet.

Dyfyniad Arddull Chicago

G.W.Tyrrell. Principles of Petrology: An Introduction to the Science of Rocks. New Delhi: Surjeet, 2006.

Dyfyniad MLA

G.W.Tyrrell. Principles of Petrology: An Introduction to the Science of Rocks. Surjeet, 2006.

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