Harkness, G. (1952). The modern rival of christian faith: An analysis of secularism. Abingdon Press.
Čikaški stil citiranja (17. izdanje)Harkness, Georgia. The Modern Rival of Christian Faith: An Analysis of Secularism. New York: Abingdon Press, 1952.
MLA način citiranja (9. izdanje)Harkness, Georgia. The Modern Rival of Christian Faith: An Analysis of Secularism. Abingdon Press, 1952.
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