Cooper, Donald R. <br/><br/>
Business research methods / 
Business research methods / 
 - 9th ed. 
 - Boston :  McGraw-Hill Irwin,  c2006. 
 - xxi, 744 p. :  ill, ;  29cm.  
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0072979232 (alk. paper) 
<br/><br/><label>LCCN: </label>2005050520 
<br/><br/><label>Dewey Class. No.: </label>658.0072  / C376