Political science :  An introduction / 
Michael G. Roskin and others 
 - 12th ed 
 - Glenview, Illinois :  Pearson Longman,  2012. 
 - 383 p.  ill (some color) ;  23 cm. 
<br/><br/><label>ISBN: </label>978-0-205-07594-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political science