Logic as a tool a guide to formal logical reasoning por Goranko, Valentin

Modal logic for philosophers por Garson, James W. 1943-

Elements of logic an integrative approach por Maboloc, Christopher Ryan B., Pascua, Edgar B. II

Teaching and learning logic (critical thinking) por Joven, Jose R.

Logic demystified por Boutelle, Anthony

Selected chpaters for the power of logic por Howard-Snyder, Frances

Logic towards critical thinking and reasoning por Ardales, Venancio B.

Logic towards critical thinking and reasoning por Ardales, Venancio B.

How to think logically por Seay, Gary, Nuccetelli, Susana

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Introduction to logic por Copi, Irving M.