Dyfyniad APA

Heilbroner,Robert L, & Thurow,Lester C. (1978). The economic problem (5.). Prentice Hall, INC.

Dyfyniad Arddull Chicago

Heilbroner,Robert L, and Thurow,Lester C. The Economic Problem. 5. London: Prentice Hall, INC, 1978.

Dyfyniad MLA

Heilbroner,Robert L, and Thurow,Lester C. The Economic Problem. 5. Prentice Hall, INC, 1978.

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