Practical research: : planning and design/ 
Leedy, Paul D. 
 - 10th edition. 
 -  Pearson Education Limited ,  2014 
 - 374 p. 
<br/><br/>
<br/><br/><label>ISBN: </label>978-1-29202117-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research -- Methodology.
<br/><br/><label>Dewey Class. No.: </label>001.4 L484 2014