Bearden, W. O., Ingram, T. N., & Laforge, R. W. (1995). Marketing: Principles & perspectives. IRWIN.
Tohutoru Kātū Chicago (17th ed.)Bearden, William O., Thomas N. Ingram, me Raymond W. Laforge. Marketing: Principles & Perspectives. Chicago: IRWIN, 1995.
Tohutoro MLA (9th ed.)Bearden, William O., et al. Marketing: Principles & Perspectives. IRWIN, 1995.
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