Lua APA (7ú heag.)
Guinness, O. (1976). In two minds: The dilemma of doubt & how to resolve it. InterVarsity Press.
Lua i Stíl Chicago (17ú heag.)
Guinness, Os. In Two Minds: The Dilemma of Doubt & How to Resolve It. Downers Grove, Ill.: InterVarsity Press, 1976.
Lua MLA (9ú heag.)
Guinness, Os. In Two Minds: The Dilemma of Doubt & How to Resolve It. InterVarsity Press, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.