Gregory, Robert J. <br/><br/>
Psychological testing :  history, principles, and applications / 
Robert J. Gregory 
 - 6th ed. : Pearson new international ed. 
 - Harlow, England :  Pearson Education,  2014 
 - ii, 666 p. :  ill. ;  28 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781292020501 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychological tests<br/>Psychological tests--History