Cohen, Lewis <br/><br/>
Research methods in education / 
Lewis Cohen. 
 - 5th ed. 
 - London :  Routledge/Falmer,  c2000. 
 - xvi, 446 p. : ill. ; 24 cm. 
<br/><br/> Bibliography : p. 407-437. 
<br/><br/><label>ISBN: </label>0415195411 
<br/><br/><label>LC Class. No.: </label>LB1028   / C66 2000