Delivering Human Services :  a  Approach to Practice / 
Alexis A. Halley , Judy Kopp, Micheal J. Austin. 
 - 3rd ed. 
 - New York:  Longman,  1992. 
 - xvii,622 p.: 
<br/><br/><label>ISBN: </label>0801306671 
<br/><br/><label>LC Class. No.: </label>HV11  / .H34 1992