Gravetter, Frederick J. <br/><br/>
Understanding research methods for the behavioral sciences / 
Frederick J. Gravetter and Lori-Ann B. Forzano. 
 - Singapore :  Cengage Learning Asia Pte Ltd,  2014. 
 - 564 pages :  illustrations ;  25 cm. 
<br/><br/> Includes bibliographical references ad index. 
<br/><br/><label>ISBN: </label>9789814352369 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology--Research--Methodology.<br/>Social Sciences--Research--Methodology.