Heck, J. D. (1991). The art of sharing your faith. Fleming.
Cita Chicago (17th ed.)Heck, Joel D. The Art of Sharing Your Faith. Grand RApids: Fleming, 1991.
Cita MLA (9th ed.)Heck, Joel D. The Art of Sharing Your Faith. Fleming, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.