Dyfyniad APA
Appleyard, D. R., & Field, A. J. (2001). International economics (4th ed.). McGraw-Hill/Irwin.
Dyfyniad Arddull Chicago
Appleyard, Dennis R., and Alfred J. Field. International Economics. 4th ed. Boston, Mass.: McGraw-Hill/Irwin, 2001.
Dyfyniad MLA
Appleyard, Dennis R., and Alfred J. Field. International Economics. 4th ed. McGraw-Hill/Irwin, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.