APA-viite (7. p.)
Engel, J. F., Kinnear, T. C., & Warshaw, M. R. (1979). Promotional strategy: Managing the marketing communications process (4th ed.). R. D. Irwin.
Chicago-viite (17. p.)
Engel, James F., Thomas C. Kinnear, ja Martin R. Warshaw. Promotional Strategy: Managing the Marketing Communications Process. 4th ed. Homewood, Ill.: R. D. Irwin, 1979.
MLA-viite (9. p.)
Engel, James F., et al. Promotional Strategy: Managing the Marketing Communications Process. 4th ed. R. D. Irwin, 1979.
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