Cita APA (7th ed.)

Nickels, W. G., & McHugh, J. M. (1987). Understanding business (4th ed.). IRWIN.

Cita Chicago (17th ed.)

Nickels, William G., i James M. McHugh. Understanding Business. 4th ed. Chicago: IRWIN, 1987.

Cita MLA (9th ed.)

Nickels, William G., i James M. McHugh. Understanding Business. 4th ed. IRWIN, 1987.