Dyfyniad APA

Longwell, C. R., & Flint, R. F. Introduction to physical geology (6th ed.).

Dyfyniad Arddull Chicago

Longwell, Chester R., and Richard F. Flint. Introduction to Physical Geology. 6th ed.

Dyfyniad MLA

Longwell, Chester R., and Richard F. Flint. Introduction to Physical Geology. 6th ed.

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