Dyfyniad APA

Gutenberg, B. (1951). Internal constitution of the earth (2nd ed.). Dover Publication.

Dyfyniad Arddull Chicago

Gutenberg, Beno. Internal Constitution of the Earth. 2nd ed. New York: Dover Publication, 1951.

Dyfyniad MLA

Gutenberg, Beno. Internal Constitution of the Earth. 2nd ed. Dover Publication, 1951.

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