Introduction to logic :  a modular approach / 
Claudio V. Tabotabo... [et al.]. 
 - Quezon City :  C & E,  c2008. 
 - 124 p. ; 22 cm. 
<br/><br/> Includes bibliography. 
<br/><br/><label>ISBN: </label>9789715847247 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.