Dyfyniad APA

Heertje, A. (1984). The U.S.A. in the world economy. Freeman, Cooper.

Dyfyniad Arddull Chicago

Heertje, Arnold. The U.S.A. in the World Economy. San Francisco, CA: Freeman, Cooper, 1984.

Dyfyniad MLA

Heertje, Arnold. The U.S.A. in the World Economy. Freeman, Cooper, 1984.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.