Ekeh, Peter P. <br/><br/>
Social exchange theory :  the two traditions / 
Peter P. Ekeh. 
 - London :  Heinemann Educational,  1974. 
 - xv, 237 p. :  ill. ;  23 cm. 
<br/><br/>Includes Bibliographical References and Index 
<br/><br/><label>ISBN: </label>0435822756 :  0435822764  £4.50. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sociology.<br/>Social psychology.
<br/><br/><label>Dewey Class. No.: </label>301  / EKS 1974