Collins, G. (2015). Faithful doubt: The wisdom of uncertainty. The Lutterworth Press.
Lua i Stíl Chicago (17ú heag.)Collins, Guy. Faithful Doubt: The Wisdom of Uncertainty. Cambridge, [England]: The Lutterworth Press, 2015.
Lua MLA (9ú heag.)Collins, Guy. Faithful Doubt: The Wisdom of Uncertainty. The Lutterworth Press, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.