APA (7th ed.) Zitazioa
(1996). world christian foundations: Introductory packet. Institute of International Education.
Chicago Style (17th ed.) Zitazioa
World Christian Foundations: Introductory Packet. U.S.A: Institute of International Education, 1996.
MLA (9th ed.) Zitazioa
World Christian Foundations: Introductory Packet. Institute of International Education, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.