Christensen, Larry B. <br/><br/>
Experimental methodology / 
by Larry B. Christensen 
 - 5th ed. 
 - Boston :  Allyn and Bacon,  1991 
 - 506 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0205127266 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology, Experimental<br/>Psychology--Experiments<br/>Experimental design