Dyfyniad APA

Economics: Principles, Problems, and Policies. McGraw-Hill/Irwin.

Dyfyniad Arddull Chicago

Economics: Principles, Problems, and Policies. McGraw-Hill/Irwin.

Dyfyniad MLA

Economics: Principles, Problems, and Policies. McGraw-Hill/Irwin.

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