Halperin, Sandra. <br/><br/>
Political research :  methods and practical skills / 
Sandra Halperin and Oliver Heath. 
 - Oxford ;  New York :  Oxford University Press,  2012. 
 - xiv, 440 pages :  illustrations. ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780199558414 (pbk.)  RM148.29 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political science--Research--Methodology.