Dyfyniad APA

Case, K. E. (2007). Principles of economics. Upper Saddle River, NJ: Pearson/Prentice Hall.

Dyfyniad Arddull Chicago

Case, Karl E. Principles of Economics. Upper Saddle River, NJ: Pearson/Prentice Hall, 2007.

Dyfyniad MLA

Case, Karl E. Principles of Economics. Upper Saddle River, NJ: Pearson/Prentice Hall, 2007.

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