Gravetter, Frederick J. <br/><br/>
Understanding research methods for the behavioral sciences / 
Frederick J. Gravetter. 
 - 2nd 
 - Singapore :  Cengage learning asia,  2012. 
 - 564 p:  23 cm 
<br/><br/> Includes bibliographic references and index 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>13: 978-981-4352-36-9 
<br/><br/><label>LC Class. No.: </label>150.72 G78u