Παραπομπή APA

Ries A I & Trout, J. (1993). Twenty two immutable laws of marketing.

Παραπομπή Chicago Style

Ries A I και Jack Trout. Twenty Two Immutable Laws of Marketing. :, 1993.

Παραπομπή MLA

Ries A I και Jack Trout. Twenty Two Immutable Laws of Marketing. 1993.