Gaya APA

Hallberg, G. (1995). All Consumers are not created equal : the differential marketing strategy for brand loyality and profits / Garth Hallberg . New York: John Wiley n Sons.

Gaya MLA

Hallberg, Garth. "All Consumers are not created equal : the differential marketing strategy for brand loyality and profits / Garth Hallberg". New York: John Wiley n Sons, 1995. Textbook.