Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

Gutenberg, Beno, and Leason Heberling Adams. Internal Constitution of the Earth. 2nd ed. Dover Publication, 1951.

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