Essential logic/ 
Arnel L. Malitao 
 - Revised edition 
 - Mandaluyong City:  National Book Store,  2010. 
 - 323 pages:  illustrations;  22 cm. 
<br/><br/> Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9710870998 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic
<br/><br/><label>LC Class. No.: </label>Fil BC 71 .M251 2010