Fraenkel, Jack R. 1932-.
How to design and evaluate research in education /
Jack R. Fraenkel, Norman E. Wallen 
. - 5th edition 
. - Boston : McGraw-Hill Higher Education,  2003 
. - xxxiv, 623, 12, 9, 6 p.  ill.  26 cm. 
<br/><label>  ISBN: </label>0-07-248560-4