Ekeh Peter P <br/><br/>
Social exchange theory    The two traditions.    
Ekeh Peter P 
 - London  Heinemann            1974 
 - xv,237p  cm. 
<br/><br/> Bibliography : P 219-229 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>YxN08:g, L4