Cunningham, W. H., Aldag, R. J., & Swift, C. M. (1989). Introduction to business (2nd ed.). South-Western Pub. Co..

Cunningham, William Hughes, Ramon J. Aldag, and Christopher M. Swift. Introduction to Business. 2nd ed. Cincinnati: South-Western Pub. Co., 1989.

Cunningham, William Hughes, et al. Introduction to Business. 2nd ed. South-Western Pub. Co., 1989.