APA (7th ed.) Citation

Shapiro, B. P., & Sviokla, J. J. (1993). Keeping customers.

Chicago Style (17th ed.) Citation

Shapiro, Benson P., and J. J. Sviokla. Keeping Customers. Boston, Mass, 1993.

MLA (9th ed.) Citation

Shapiro, Benson P., and J. J. Sviokla. Keeping Customers. 1993.