Dyfyniad APA

(1968). The interaction of sciences in the study of the earth. Progress.

Dyfyniad Arddull Chicago

The Interaction of Sciences in the Study of the Earth. Moscow: Progress, 1968.

Dyfyniad MLA

The Interaction of Sciences in the Study of the Earth. Progress, 1968.

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