Rubin, Allen <br/><br/>
Research methods for social work / 
Allen Rubin, Earl Babbie 
 - 5 
 - Belmont, CA :  Thomson - Brooks - Cole,  2005       
 - xxiv, 789 p. 
<br/><br/><label>ISBN: </label>0534621112 
<br/><br/><label>LC Class. No.: </label>HV 11 R896r 2005