Nickels, W. G., McHugh, J. M., & McHugh, S. M. (1996). Understanding business (4th ed.). Irwin.
Citazione stile Chigago Style (17a edizione)Nickels, William G., James M. McHugh, e Susan M. McHugh. Understanding Business. 4th ed. Chicago: Irwin, 1996.
Citatione MLA (9a ed.)Nickels, William G., et al. Understanding Business. 4th ed. Irwin, 1996.