Cita APA (7th ed.)

COREY E R. (1985). PROBLEMS IN MARKETING (6TH.). MCGRAW-HILL.

Cita Chicago (17th ed.)

COREY E R. PROBLEMS IN MARKETING. 6TH. NEW YORK: MCGRAW-HILL, 1985.

Cita MLA (9th ed.)

COREY E R. PROBLEMS IN MARKETING. 6TH. MCGRAW-HILL, 1985.