APA (7th ed.) Zitazioa
George, B. (1989). Classic Christianity. Harvest House.
Chicago Style (17th ed.) Zitazioa
George, Bob. Classic Christianity. Eugene, Or.: Harvest House, 1989.
MLA (9th ed.) Zitazioa
George, Bob. Classic Christianity. Harvest House, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.