Dyfyniad APA

Association of national advertisers. (1957). Advertising at the point of purchase. Mcgraw Hill book company.

Dyfyniad Arddull Chicago

Association of national advertisers. Advertising at the Point of Purchase. New York: Mcgraw Hill book company, 1957.

Dyfyniad MLA

Association of national advertisers. Advertising at the Point of Purchase. Mcgraw Hill book company, 1957.

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