Schellenberg, J. L. (2007). The wisdom to doubt: A justification of religious skepticism. Cornell University Press.
Lua i Stíl Chicago (17ú heag.)Schellenberg, J. L. The Wisdom to Doubt: A Justification of Religious Skepticism. Ithaca: Cornell University Press, 2007.
Lua MLA (9ú heag.)Schellenberg, J. L. The Wisdom to Doubt: A Justification of Religious Skepticism. Cornell University Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.