Ekeh ,Peter P <br/><br/>
Social exchange theory  two traditons 

 - London  Heinemann educational books ltd  1974 
 - xvi, 237 p.; 22cm 
<br/><br/><label>ISBN: </label>435822756 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Role playing<br/>Role reversal<br/>Social role<br/>Sociology