Cita APA (7th ed.)
Nickels, W. G., McHugh, J. M., & McHugh, S. M. (1999). Understanding business (5th ed.). Irwin/McGraw-Hill.
Cita Chicago (17th ed.)
Nickels, William G., James M. McHugh, i Susan M. McHugh. Understanding Business. 5th ed. Boston: Irwin/McGraw-Hill, 1999.
Cita MLA (9th ed.)
Nickels, William G., et al. Understanding Business. 5th ed. Irwin/McGraw-Hill, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.