Ekeh, Peter P <br/><br/>
Social exchange theory: the two traditions 

 - Ist ed. 
 - London  Heinemann  1974 
 - xiii,299 p. 
<br/><br/><label>ISBN: </label> POU4.25 
<br/><br/><label>Dewey Class. No.: </label>301.24 E32S