Mitchell, Mark L. <br/><br/>
Research design explained / 
Mark L. Mitchell, Janina M. Jolley 
 - 8th ed. 
 - Belmont, CA :  Wadsworth Cengage Learning,  2013 
 - xxiii, 723 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781133049838 1133049834 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology--Research--Methodology<br/>Psychology, Experimental--Research--Methodology