Halperin, Sandra. <br/><br/>
Political research :  methods and practical skills / 
Sandra Halperin and Oliver Heath. 
 - Oxford ;  Oxford University Press,  2012. 
 - xiv, 440 p. : 
<br/><br/><label>ISBN: </label>9780199558414 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political science-Research--
<br/><br/><label>Dewey Class. No.: </label>320.072  / Po