Churchill's , R. P. (1986). Study guide to accompany becoming logical an introduction to logic. St.Marin's Press.
Citace podle Chicago (17th ed.)Churchill's , Robert Paul. Study Guide to Accompany Becoming Logical an Introduction to Logic. St.Marin's Press, 1986.
Citace podle MLA (9th ed.)Churchill's , Robert Paul. Study Guide to Accompany Becoming Logical an Introduction to Logic. St.Marin's Press, 1986.
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