Natividad, Evelyn. <br/><br/>
Effective guide to libraries and reference sources / 
Evelyn Natividad. 
 - Manila :  National Book Store,  c1987. 
 - 245 pages :  Illustration ;  22 cm. 
<br/><br/>Bibliography: p. 244-245 
<br/><br/><label>ISBN: </label>9710839837