Applied social research :  a tool for the human services / 
Duane ... [et. al]. 
 - 9th ed. 
 - Belmont, CA :  Brooks/Cole Cengage Learning,  2013. 
 - xxxix, 545 p. ;  24 cm. 
<br/><br/>Includes index and references : p. 503-526. 
<br/><br/><label>ISBN: </label>9781285075518  RM 567.30 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social service--Research--Methodology.<br/>Human services--Research--Methodology.<br/>Social service--United States.