JOHNSON EUGENE M. (1994). SALES MANAGEMENT: CONCEPTS, PRACTICES, AND CASES (2ND.). MCGRAW-HILL.
Chicago-viite (17. p.)JOHNSON EUGENE M. SALES MANAGEMENT: CONCEPTS, PRACTICES, AND CASES. 2ND. NEW YORK: MCGRAW-HILL, 1994.
MLA-viite (9. p.)JOHNSON EUGENE M. SALES MANAGEMENT: CONCEPTS, PRACTICES, AND CASES. 2ND. MCGRAW-HILL, 1994.
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