Patton, Michael Quinn. <br/><br/>
Qualitative evaluation and research methods / 
by Michael Quinn Patton. 
 - 2nd ed. 
 - Newbury Park :  Sage Publications,  1990. 
 - 532 p. ;  23 cm. 
<br/><br/> Rev ed. of : Qualitative evaluation methods, 1980 
<br/><br/><label>ISBN: </label>0803937792  RM160.60 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Methodology.<br/>Evaluation research (Social action programs).