Gay, L.R. <br/><br/>
Educational research : competencies for analysis and application 
L.R. Gay 
 - 4th ed 
 - New York   Macmillan Publishing Company  c1992. 
 - 645 p. :  23 cm. 
<br/><br/><label>ISBN: </label>9780023408007 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research--General, AS
<br/><br/><label>Dewey Class. No.: </label>370.78 GAY