Leedy, Paul D.  <br/><br/>
Practical research  : planning and design 
Paul D. Leedy and Jeanne Ellis Ormrod 
 - 11th ed.  
 - Boston:  Pearson,  2015. 
 - 407p. 
<br/><br/><br/>Eng 
<br/><br/><label>ISBN: </label>9781292095875 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research Methodology
<br/><br/><label>Dewey Class. No.: </label>001.4  / LEP