Human behavior and the social environment :  social systems theory / 
Orren Dale ... [et al.] 
 - 5th ed. 
 - Boston :  Pearson/Allyn and Bacon,  2006 
 - xiii, 440 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>020544606X (hbk.)  RM294.41 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social service<br/>Social systems<br/>Social systems--Mathematical models<br/>Human behavior