Ed:SOMEKH,B. ; LEWIN,C. <br/><br/>
Theory and Methods in Social Research 

 - 2nd ed. 
 -  India:Sage Publications  2011 
 - 344 p. 
<br/><br/><label>ISBN: </label>9788132110002 
<br/><br/><label>Dewey Class. No.: </label>300.72  / T32