APA način citiranja (7. izdanje)
Guinness, O. (1976). In two minds: The dilemma of doubt & how to resolve it. InterVarsity Press.
Čikaški stil citiranja (17. izdanje)
Guinness, Os. In Two Minds: The Dilemma of Doubt & How to Resolve It. Downers Grove, Ill.: InterVarsity Press, 1976.
MLA način citiranja (9. izdanje)
Guinness, Os. In Two Minds: The Dilemma of Doubt & How to Resolve It. InterVarsity Press, 1976.
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