Introduction to research in education / Donald Ary ... [et al.]. 

 - 9th ed. 
 - [Belmont, Calif.] :   Wadsworth Cengage Learning,  c [2014] 
 - xx, 700 pages :   illustrations ;    26 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781133939610 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education --  Research.
<br/><br/><label>Dewey Class. No.: </label>370.72 I N R 221