Cohen, Louis,  1928-, <br/><br/>
Research methods in education / 
Louis Cohen and Lawrence Manion. 
 - 4th edition. 
 - London :  Routledge,  1994. 
 - 414 pages :  illustrations ;  24 cm. 
<br/><br/>Incudes bibliographical references (page 385-402) and index. 
<br/><br/><label>ISBN: </label>0415102359  RM60.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational research.