Gregorio , Herman Cruz <br/><br/>
Principles and methods of teaching / 
by Herman C. Gregorio. 
 - Rev. ed 
 - Quezon City :  Garcia Pub,  1976. 
 - xx, 580 p. 
<br/><br/> Includes glossary, appendices and index. 
<br/><br/><label>ISBN: </label>971-871108-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Study and teaching<br/>Education--Philippines