Cita APA (7a ed.)

American Marketing Association, Spekman, R. E., & Wilson, D. T. (1985). A strategic approach to business marketing. American Marketing Association.

Cita Chicago Style (17a ed.)

American Marketing Association, Robert E. Spekman, y David T. Wilson. A Strategic Approach to Business Marketing. Chicago: American Marketing Association, 1985.

Cita MLA (9a ed.)

American Marketing Association, et al. A Strategic Approach to Business Marketing. American Marketing Association, 1985.