Christensen, Larry B.,  1941- <br/><br/>
Experimental methodology / 
Larry B. Christensen 
 - 9th ed. 
 - Boston, MA :  Pearson/Allyn and Bacon,  2004 
 - xviii, 494 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0205393691  RM351.35 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology, Experimental<br/>Psychology--Experiments<br/>Experimental design