Dyfyniad APA
Frank, R. H., & Bernanke, B. S. (2004). Principles of economics (2nd ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Frank, Robert H., and Ben S. Bernanke. Principles of Economics. 2nd ed. Boston, Mass.: McGraw-Hill, 2004.
Dyfyniad MLA
Frank, Robert H., and Ben S. Bernanke. Principles of Economics. 2nd ed. McGraw-Hill, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.