Bernstein, Robert A. <br/><br/>
An introduction to political science methods / 
Robert A. Bernstein. 
 - 3rd ed. 
 - Englewood Cliffs :  Prentice Hall,  1992. 
 - 327 p. 
<br/><br/><label>ISBN: </label>013489071 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political science--Methodology.<br/>Political science--Research.
<br/><br/><label>LC Class. No.: </label>JA73  / .B42