Dalrymple, D. J., & Parsons, L. J. (1990). Marketing management: Strategy and cases (5th ed.). John Wiley.

Dalrymple, Douglas J., and Leonard J. Parsons. Marketing Management: Strategy and Cases. 5th ed. New York: John Wiley, 1990.

Dalrymple, Douglas J., and Leonard J. Parsons. Marketing Management: Strategy and Cases. 5th ed. John Wiley, 1990.