APA (7th ed.) Citation

Nickels, W. G., McHugh, J. M., & McHugh, S. M. (1990). Understanding business (2nd ed.). Irwin.

Chicago Style (17th ed.) Citation

Nickels, William G., James M. McHugh, and Susan M. McHugh. Understanding Business. 2nd ed. Homewood, IL: Irwin, 1990.

MLA (9th ed.) Citation

Nickels, William G., et al. Understanding Business. 2nd ed. Irwin, 1990.