Tull, D. S., & Hawkins, D. I. (1987). Marketing research: Measurement and method : a text with cases (4th ed.). Macmillan Pub. Co. ; Collier Macmillan.
Chicago-čujuhus (17. p.)Tull, Donald S., juo Del I. Hawkins. Marketing Research: Measurement and Method : A Text with Cases. 4th ed. New York : London: Macmillan Pub. Co. ; Collier Macmillan, 1987.
MLA-čujuhus (9. p.)Tull, Donald S., juo Del I. Hawkins. Marketing Research: Measurement and Method : A Text with Cases. 4th ed. Macmillan Pub. Co. ; Collier Macmillan, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.