Oxford advanced learners dictionary. 

 - 1st Ed. 
 - New Delhi :  Oxford University Press,  2010. 
 - 1796p. ;  00 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>POLITICAL SCIENCE.
<br/><br/><label>Dewey Class. No.: </label>423  / HOR