Cruz, Corazon L. <br/><br/>
Introduction to logic / 
Corazon L. Cruz. 
 - 4th edition. 
 - Mandaluyong City :  National Book Store,  2011. 
 - xii, 363 pages ;  22 cm. 
<br/><br/><label>ISBN: </label>9710857975 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.