APA (7th ed.) Citation

Whaley, D. J., & Rivera, R. R. (1983). Problems and materials on sales. Little, Brown.

Chicago Style (17th ed.) Citation

Whaley, Douglas J., and Rhonda R. Rivera. Problems and Materials on Sales. Boston: Little, Brown, 1983.

MLA (9th ed.) Citation

Whaley, Douglas J., and Rhonda R. Rivera. Problems and Materials on Sales. Little, Brown, 1983.