Patton, Michael Quinn. <br/><br/>
Utilization-focused evaluation / 
Michael Quinn Patton. 
 - Beverly Hills :  Sage Publications,  c1978. 
 - 304 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>0803909829 :  0803909810 
<br/><br/><label>Dewey Class. No.: </label>361.6/1/068