Patton, Michael Q. <br/><br/>
Qualitative research & evaluation methods :  integrating theory and practice 

 - 4th ed. 
 - London :  Sage ,  2015 . 
 - xxi, 806p. :  ill. 
<br/><br/> includes bibliographical reference and indexes 
<br/><br/><label>ISBN: </label>9781412972123 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences-Methodology<br/>Evaluation research (Social action programs)
<br/><br/><label>LC Class. No.: </label>H 62 .P3218 2014