APA (7th ed.) Zitazioa
De, B. (2007). Business economics and business environment (3rd ed.). Tee Dee pub.
Chicago Style (17th ed.) Zitazioa
De, Bipul. Business Economics and Business Environment. 3rd ed. Kolkata: Tee Dee pub, 2007.
MLA (9th ed.) Zitazioa
De, Bipul. Business Economics and Business Environment. 3rd ed. Tee Dee pub, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.