Empirical political analysis :  research methods in political science / 
Jarol B. Manheim ... [et al.] 
 - 6th ed. 
 - New York :  Pearson/Longman,  2006. 
 - 430 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0321298608  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political science--Research
<br/><br/><label>LC Class. No.: </label>JA86