Research in education 
Best, John W. 
 - 6th ed. 
 -  Prentice Hall.  1989 
 - x, 388 p. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71110679-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education -- Research.
<br/><br/><label>Dewey Class. No.: </label>370.78 B46r 1989