Churchill, R. P. (1986). Becoming logical: An introduction to logic. St. Martin's Press.
Čikaški stil citiranjaChurchill, Robert Paul. Becoming Logical: An Introduction to Logic. New York: St. Martin's Press, 1986.
MLA način citiranjaChurchill, Robert Paul. Becoming Logical: An Introduction to Logic. St. Martin's Press, 1986.
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