APA (7th ed.) Zitazioa

Nickels, W. G. (2008). Understanding Business. (8th ed.). McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Nickels, William G. Understanding Business. 8th ed. New York: McGraw-Hill, 2008.

MLA (9th ed.) Zitazioa

Nickels, William G. Understanding Business. 8th ed. McGraw-Hill, 2008.