APA (7th ed.) Zitazioa
Heck, J. D. (1991). The art of sharing your faith. Fleming.
Chicago Style (17th ed.) Zitazioa
Heck, Joel D. The Art of Sharing Your Faith. Grand RApids: Fleming, 1991.
MLA (9th ed.) Zitazioa
Heck, Joel D. The Art of Sharing Your Faith. Fleming, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.