Cozby, Paul C. <br/><br/>
Methods in Behavioral Research 
/ by Paul C. Cozby 
 - 6th ed. 
 - London:  Mayfield publishing,  1977. 
 - 335p. 
<br/><br/><label>ISBN: </label>1559346590 
<br/><br/><label>Dewey Class. No.: </label>150.72  / COZ/M