Pananaliksik-wika at panitikan 
De Leon, Elmer B. 
 -  Lorimar Publishing, Inc.,  2021 
 - xx, 232 pages 
<br/><br/>
<br/><br/><label>ISBN: </label>978-6-214-51018-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication -- study and teaching.
<br/><br/><label>Dewey Class. No.: </label>F 499.21 D3467 2021