APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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