Gravetter, Frederick J. <br/><br/>
Understanding Research methods for the bevaioral science / 
Frederick J. Gravetter. 
 - 2nd 
 - Singapore :  Cengage Learning Asia,  2012. 
 - 564p:   23cm 
<br/><br/> Includes bibliographic references and index 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>978-981-4352-36-9 
<br/><br/><label>LC Class. No.: </label>150.72 G78u