Mitchell, Mark. <br/><br/>
Research design explained / 
Mark Mitchell. 
 - 2nd ed. 
 - Philadelphia :  Harcourt Brace,  1992. 
 - 644p. 
<br/><br/><label>ISBN: </label>0030559723 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology--Research--Methodology.<br/>Psychology, Experimental--Methodology.
<br/><br/><label>LC Class. No.: </label>BF76.5  / .M57