Dyfyniad APA

COREY E R. (1985). PROBLEMS IN MARKETING (6TH.). MCGRAW-HILL.

Dyfyniad Arddull Chicago

COREY E R. PROBLEMS IN MARKETING. 6TH. NEW YORK: MCGRAW-HILL, 1985.

Dyfyniad MLA

COREY E R. PROBLEMS IN MARKETING. 6TH. MCGRAW-HILL, 1985.

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