Dyfyniad APA

Frank, R. H. (2010). Principles of economics. 2nd ed: McGraw-Hill Education.

Dyfyniad Arddull Chicago

Frank, Robert H. Principles of Economics. 2nd ed: McGraw-Hill Education, 2010.

Dyfyniad MLA

Frank, Robert H. Principles of Economics. 2nd ed: McGraw-Hill Education, 2010.

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