APA (7th ed.) Zitazioa

Nickels, W. G. (1987). Understanding business (4th ed.). Times Mirror.

Chicago Style (17th ed.) Zitazioa

Nickels, William G. Understanding Business. 4th ed. Toronto: Times Mirror, 1987.

MLA (9th ed.) Zitazioa

Nickels, William G. Understanding Business. 4th ed. Times Mirror, 1987.