Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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