Guttenplan, S. D. (1998). The languages of logic: An introduction to formal logic (2nd ed.). Blackwell Publishers.
Cita Chicago Style (17a ed.)Guttenplan, Samuel D. The Languages of Logic: An Introduction to Formal Logic. 2nd ed. Oxford, UK ; Malden, Mass.: Blackwell Publishers, 1998.
Cita MLA (9a ed.)Guttenplan, Samuel D. The Languages of Logic: An Introduction to Formal Logic. 2nd ed. Blackwell Publishers, 1998.
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