Cohen, Louis,   1928- <br/><br/>
Research methods in education / 
by Louis Cohen, Lawrence Manion & Keith Morrison. 
 - 6th ed. 
 - London :  Routledge,  2007. 
 - xviii, 638 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780415368780 (pbk.) 0415374103 (hbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education-- Research.
<br/><br/><label>Dewey Class. No.: </label>370.72