Engel, J. F., Warshaw, M. R., & Kinnear, T. C. (1994). Promotional strategy: Managing the marketing communications process (8th ed.). Irwin.
Citace podle Chicago (17th ed.)Engel, James F., Martin R. Warshaw, a Thomas C. Kinnear. Promotional Strategy: Managing the Marketing Communications Process. 8th ed. Burr Ridge, Ill: Irwin, 1994.
Citace podle MLA (9th ed.)Engel, James F., et al. Promotional Strategy: Managing the Marketing Communications Process. 8th ed. Irwin, 1994.
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