YOFFIE, D. (1994). International Trade And Competition. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)YOFFIE, David. International Trade And Competition. McGraw-Hill, 1994.
Lua MLA (8ú heag.)YOFFIE, David. International Trade And Competition. McGraw-Hill, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.