Introduction to social research :  quantitative and qualitative approaches / 
Keith F. Punch. 
 - London :  Sage Publications,  c1998. 
 - xv, 319 p. ;  25  cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0761958134 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research