Dyfyniad APA

Worester, P. G. (1948). Textbook of geomorphology (2nd ed.). Van Nostrand Reinhold Company.

Dyfyniad Arddull Chicago

Worester, Philip G. Textbook of Geomorphology. 2nd ed. New York: Van Nostrand Reinhold Company, 1948.

Dyfyniad MLA

Worester, Philip G. Textbook of Geomorphology. 2nd ed. Van Nostrand Reinhold Company, 1948.

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