APA (7th ed.) Zitazioa
Richardson. (1993). Business ethics 93/94 (5th ed.). Dushkin.
Chicago Style (17th ed.) Zitazioa
Richardson. Business Ethics 93/94. 5th ed. Connecticut: Dushkin, 1993.
MLA (9th ed.) Zitazioa
Richardson. Business Ethics 93/94. 5th ed. Dushkin, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.