Patton, Michael Quinn <br/><br/>
Qualitative evaluation and research methods/ 
Michael Quinn, Patton 
 - 2nd 
 - New York:  Sage Publications;  1990. 
 - 532P.: 
<br/><br/><label>ISBN: </label>0-8039-3779-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences
<br/><br/><label>Dewey Class. No.: </label>300.72   / PAT N90Q