Dyfyniad APA
Appleyard, D. R., & Field, A. J. (1998). International economics (3rd ed.). Irwin/McGraw-Hill.
Dyfyniad Arddull Chicago
Appleyard, Dennis R., and Alfred J. Field. International Economics. 3rd ed. Boston: Irwin/McGraw-Hill, 1998.
Dyfyniad MLA
Appleyard, Dennis R., and Alfred J. Field. International Economics. 3rd ed. Irwin/McGraw-Hill, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.