McBurney Donald <br/><br/>
Research methods 

 - 4th 
 - Pacific  Grove Brooks / Cole Publishing company USA    1998 
 - 434 p.  cm. 
<br/><br/><label>ISBN: </label>0534355102 
<br/><br/><label>Source: </label> TB 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PSYCHOLOGY