Cita APA (7th ed.)

BERKOWITZ ERIC N. (1989). MARKETING (2.). RICHARD D.IRWIN INC.

Cita Chicago (17th ed.)

BERKOWITZ ERIC N. MARKETING. 2. U.S.A: RICHARD D.IRWIN INC, 1989.

Cita MLA (9th ed.)

BERKOWITZ ERIC N. MARKETING. 2. RICHARD D.IRWIN INC, 1989.