Churchill's , R. P. (1986). Study guide to accompany becoming logical an introduction to logic. St.Marin's Press.
Цитирование в стиле Чикаго (17-е изд.)Churchill's , Robert Paul. Study Guide to Accompany Becoming Logical an Introduction to Logic. St.Marin's Press, 1986.
Цитирование MLA (9-е изд.)Churchill's , Robert Paul. Study Guide to Accompany Becoming Logical an Introduction to Logic. St.Marin's Press, 1986.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.