Ceniza, Claro R., <br/><br/>
Elementary logic 
Claro R. Ceniza 
 - 3rd  edition 
 - Manila :  De La Salle University Press,  1994. 
 - xii, 247 pages :  22 cm. 
<br/><br/> Includes Index. 
<br/><br/>Includes bibliographic references (page 242). 
<br/><br/><label>ISBN: </label>971555007x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic--Study and teaching.<br/>Logic--Textbooks.
<br/><br/><label>Dewey Class. No.: </label>160  / C322e