Appleyard, D. R., & Field, A. J. (1998). International economics (3rd ed.). Irwin/McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Appleyard, Dennis R., agus Alfred J. Field. International Economics. 3rd ed. Boston: Irwin/McGraw-Hill, 1998.
Lua MLA (8ú heag.)Appleyard, Dennis R., agus Alfred J. Field. International Economics. 3rd ed. Irwin/McGraw-Hill, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.