Dyfyniad APA

(1972). Economic information file. Tokyo: World Economic Information Services.

Dyfyniad Arddull Chicago

Economic Information File. Tokyo: World Economic Information Services, 1972.

Dyfyniad MLA

Economic Information File. Tokyo: World Economic Information Services, 1972.

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