APA (7th ed.) Zitazioa

Engel, J. F., & Warshaw, M. R. (1994). Promotional strategy: Managing the marketing communications process (8th ed.). IRWIN.

Chicago Style (17th ed.) Zitazioa

Engel, James F., eta Martin R. Warshaw. Promotional Strategy: Managing the Marketing Communications Process. 8th ed. Chicago: IRWIN, 1994.

MLA (9th ed.) Zitazioa

Engel, James F., eta Martin R. Warshaw. Promotional Strategy: Managing the Marketing Communications Process. 8th ed. IRWIN, 1994.