Nachmias, David, <br/><br/>
Research methods in the social sciences / 
David Nachmias, Chava Nachmias. 
 - 2nd edition. 
 - New York :  St. Martin's Press,  1981. 
 - 585 pages :  illustrations ;  24 cm. 
<br/><br/> Includes indexes. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0312676212 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.<br/>Social sciences--Methodology.