Dyfyniad APA

BERRY LEONARD L. (1991). MARKETING SERVICES: COMPETING THROUGH QUALITY. FREE PRESS.

Dyfyniad Arddull Chicago

BERRY LEONARD L. MARKETING SERVICES: COMPETING THROUGH QUALITY. NEW YORK: FREE PRESS, 1991.

Dyfyniad MLA

BERRY LEONARD L. MARKETING SERVICES: COMPETING THROUGH QUALITY. FREE PRESS, 1991.

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