Wiersma, William. <br/><br/>
Research methods in education :  an introduction / 
William Wiersma. 
 - 4th ed. 
 - Boston :  Allyn,  1975. 
 - 466 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research.
<br/><br/><label>LC Class. No.: </label>LB1028  / .W517