APA (7th ed.) Citation

Stevens, R. E., Loudon, D. L., & Warren, W. E. (1991). Marketing planning guide. Haworth Press.

Chicago Style (17th ed.) Citation

Stevens, Robert E., David L. Loudon, and William E. Warren. Marketing Planning Guide. New York: Haworth Press, 1991.

MLA (9th ed.) Citation

Stevens, Robert E., et al. Marketing Planning Guide. Haworth Press, 1991.