Dyfyniad APA

Harcourt,G C, & Karmel,P H. (1968). Economic activity. Cambridge University Press.

Dyfyniad Arddull Chicago

Harcourt,G C, and Karmel,P H. Economic Activity. Cambridge: Cambridge University Press, 1968.

Dyfyniad MLA

Harcourt,G C, and Karmel,P H. Economic Activity. Cambridge University Press, 1968.

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