APA (7th ed.) Citation

Irwin, McHugh, J., McHugh, S., & Nickels, W. (1993). Understanding business (3th.). Irwin.

Chicago Style (17th ed.) Citation

Irwin, J. McHugh, S. McHugh, and W. Nickels. Understanding Business. 3th. Boston: Irwin, 1993.

MLA (8th ed.) Citation

Irwin, et al. Understanding Business. 3th. Irwin, 1993.