Dyfyniad APA

Samuelson, P. A., & Temin, P. (1976). Economics (10th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Samuelson, Paul Anthony, and Peter Temin. Economics. 10th ed. New York: McGraw-Hill, 1976.

Dyfyniad MLA

Samuelson, Paul Anthony, and Peter Temin. Economics. 10th ed. McGraw-Hill, 1976.

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