APA (7th ed.) Zitazioa
Sugdan Christopher. (1981). Radical discipleship (ed.). Marshalls.
Chicago Style (17th ed.) Zitazioa
Sugdan Christopher. Radical Discipleship. ed. London: Marshalls, 1981.
MLA (9th ed.) Zitazioa
Sugdan Christopher. Radical Discipleship. ed. Marshalls, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.