Fraenkel, Jack R. How to design and evaluate research in education / Jack R. Fraenkel, Norman E. wallen. - Seventh edition. - New York, N.Y. : McGraw-Hill, c2008. - xviii, 642p. : Illustrations (colored) ; 26 cm. ISBN: 9780071287920 Subjects--Topical Terms: Research methods Education. Dewey Class. No.: GS 001.42 F842 2010