Lewis, H. G. (1974). The businessman's guide to advertising & sales promotion. Gregg and Community College Division, McGraw-Hill.
Citace podle Chicago (17th ed.)Lewis, Herschell Gordon. The Businessman's Guide to Advertising & Sales Promotion. New York: Gregg and Community College Division, McGraw-Hill, 1974.
Citace podle MLA (8th ed.)Lewis, Herschell Gordon. The Businessman's Guide to Advertising & Sales Promotion. Gregg and Community College Division, McGraw-Hill, 1974.
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