Dyfyniad APA

Mankiw, N. G. (2001). Principles of economics (2nd ed.). Harcourt College.

Dyfyniad Arddull Chicago

Mankiw, N. Gregory. Principles of Economics. 2nd ed. Fort Worth, Tex: Harcourt College, 2001.

Dyfyniad MLA

Mankiw, N. Gregory. Principles of Economics. 2nd ed. Harcourt College, 2001.

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