Gravetter, Frederick J. <br/><br/>
Research methods for the behavioral sciences 

 - 6th edition. 
 - Cengage :  Boston, MA,  2018. 
 - 546 p    
<br/><br/><label>ISBN: </label>9781337613316 1337613312 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology.
<br/><br/><label>LC Class. No.: </label>BF76.5  / .G73