Jackson, D W.(1987). The Relative Importance of Various Promotional Elements in Different Industrial Purchase Situations. Journal of Advertising, 16(4), 25-33. doi:10.1080/00913367.1987.10673092
MLA CitationJackson, Donald W. "The Relative Importance of Various Promotional Elements in Different Industrial Purchase Situations". Journal of Advertising, 16.4 ( 1987 ): 25-33.
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