Dyfyniad APA

RIES AL; TROUT JACK. (1993). 22 IMMUTABLE LAWS OF MARKETING: VIOLATE THEM AT YOUR OWN RISK. INDU PUBLICATIONS.

Dyfyniad Arddull Chicago

RIES AL; TROUT JACK. 22 IMMUTABLE LAWS OF MARKETING: VIOLATE THEM AT YOUR OWN RISK. NEW DELHI: INDU PUBLICATIONS, 1993.

Dyfyniad MLA

RIES AL; TROUT JACK. 22 IMMUTABLE LAWS OF MARKETING: VIOLATE THEM AT YOUR OWN RISK. INDU PUBLICATIONS, 1993.

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