Dyfyniad APA

Singh, D. B. (1970). The problem of world reserves. World Press.

Dyfyniad Arddull Chicago

Singh, David Bright. The Problem of World Reserves. Calcutta: World Press, 1970.

Dyfyniad MLA

Singh, David Bright. The Problem of World Reserves. World Press, 1970.

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