Dyfyniad APA

Beardshaw, J., & Brewster, D. (1992). Economics: A student's guide (4th ed.). Pearson education.

Dyfyniad Arddull Chicago

Beardshaw, John, and David Brewster. Economics: A Student's Guide. 4th ed. Harlow: Pearson education, 1992.

Dyfyniad MLA

Beardshaw, John, and David Brewster. Economics: A Student's Guide. 4th ed. Pearson education, 1992.

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