Effective guide to libraries & references sources 
Natividad, Evelyn A...[et.al.]. 
 -  National Book Store, Inc.  1987 
 - 245 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71083983-7 
<br/><br/><label>Dewey Class. No.: </label>F 021 Ef3 1987