Cita APA (7th ed.)

TULL DONALD S. (1987). MARKETING RESEARCH: MEASUREMENT AND METHOD (4.). MACMILLAN.

Cita Chicago (17th ed.)

TULL DONALD S. MARKETING RESEARCH: MEASUREMENT AND METHOD. 4. NEW YARK: MACMILLAN, 1987.

Cita MLA (9th ed.)

TULL DONALD S. MARKETING RESEARCH: MEASUREMENT AND METHOD. 4. MACMILLAN, 1987.