Hull, J. M. (1991). What prevents christian adults from learning? Trinity.
Lua i Stíl Chicago (17ú heag.)Hull, John M. What Prevents Christian Adults from Learning? Philadelphia: Trinity, 1991.
Lua MLA (9ú heag.)Hull, John M. What Prevents Christian Adults from Learning? Trinity, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.