Heertje, A. (1984). The U.S.A. in the world economy. Freeman, Cooper.
Lua i Stíl Chicago (17ú heag.)Heertje, Arnold. The U.S.A. in the World Economy. San Francisco, CA: Freeman, Cooper, 1984.
Lua MLA (9ú heag.)Heertje, Arnold. The U.S.A. in the World Economy. Freeman, Cooper, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.