Dyfyniad APA

O'Dell, A. (1967). Geography: Our earth and its people. Grolier.

Dyfyniad Arddull Chicago

O'Dell, A.C. Geography: Our Earth and Its People. London: Grolier, 1967.

Dyfyniad MLA

O'Dell, A.C. Geography: Our Earth and Its People. Grolier, 1967.

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