APA-čujuhus (7. p.)
Kress, G. (1988). Marketing research (3rd ed.). Prentice Hall.
Chicago-čujuhus (17. p.)
Kress, George. Marketing Research. 3rd ed. Englewood Cliffs, N.J.: Prentice Hall, 1988.
MLA-čujuhus (9. p.)
Kress, George. Marketing Research. 3rd ed. Prentice Hall, 1988.
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