Introduction to educational research 
Mertler, Craig A. 
 -  Sage.  2016 
 - xvii, 380 p. 
<br/><br/>
<br/><br/><label>ISBN: </label>978-1-48337548-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education -- Research -- Methodology.
<br/><br/><label>Dewey Class. No.: </label>370.72 M5755 2016