6, Perri, <br/><br/>
Principles of methodology : 

 - Los Angeles :  2012.a  SAGE,  2012.b  2012.c 
 - viii, 325 p. :  ill. ; 
<br/><br/><label>ISBN: </label>9780857024732 (cased) 0857024736 (cased) 9780857024749 (pbk.) 0857024744 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences
<br/><br/><label>LC Class. No.: </label>MED H62  / A512 2012