Dyfyniad APA

RIES AL. (1989). BOTTOM-UP MARKETING. MCGRAW-HILL.

Dyfyniad Arddull Chicago

RIES AL. BOTTOM-UP MARKETING. NEW YORK: MCGRAW-HILL, 1989.

Dyfyniad MLA

RIES AL. BOTTOM-UP MARKETING. MCGRAW-HILL, 1989.

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