APA-referens (7:e uppl.)

FERRELL O C. (1989). MARKETING CONCEPTS AND STRATEGIES (6TH.). HOUGHTON & MIFFLIN.

Chicago-referens (17:e uppl.)

FERRELL O C. MARKETING CONCEPTS AND STRATEGIES. 6TH. BOSTON: HOUGHTON & MIFFLIN, 1989.

MLA-referens (9:e uppl.)

FERRELL O C. MARKETING CONCEPTS AND STRATEGIES. 6TH. HOUGHTON & MIFFLIN, 1989.