Essentials of research design and methodology 
Marczyk, Geoffrey. 
 -  John Wiley & Sons, Inc.  2005 
 - 290 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-471-47053-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology -- Research -- Methodology.
<br/><br/><label>Dewey Class. No.: </label>150.72 M33e 2005