Cita APA (7a ed.)

BOYD HARPER W. (1990). MARKETING RESEARCH (7.). RICHARD D.IRWIN INC.

Cita Chicago Style (17a ed.)

BOYD HARPER W. MARKETING RESEARCH. 7. ILLINOIS U.S.A: RICHARD D.IRWIN INC, 1990.

Cita MLA (9a ed.)

BOYD HARPER W. MARKETING RESEARCH. 7. RICHARD D.IRWIN INC, 1990.