Dyfyniad APA

Clark, C. (1960). The conditions of economic progress (3th.ed.). Garland Pub..

Dyfyniad Arddull Chicago

Clark, Colin. The Conditions of Economic Progress. 3th.ed. New York: Garland Pub., 1960.

Dyfyniad MLA

Clark, Colin. The Conditions of Economic Progress. 3th.ed. Garland Pub., 1960.

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