Cita APA (7th ed.)
Nickels, W. G., McHugh, J. M., & McHugh, S. M. (2002). Understanding business (6th ed.). McGraw-Hill.
Cita Chicago (17th ed.)
Nickels, William G., James M. McHugh, i Susan M. McHugh. Understanding Business. 6th ed. Boston, Mass.: McGraw-Hill, 2002.
Cita MLA (9th ed.)
Nickels, William G., et al. Understanding Business. 6th ed. McGraw-Hill, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.