Wallen, Norman E.
Educational research : a guide to the process / by Norman E. Wallen and Jack R. Fraenkel.
. – 2nd ed.
. – London : Routledge, 2013
xix, 548 p. : ill. ; 26 cm.
Includes bibliographical references and index.
ISBN9780805832808 : £69.99
1. Education – Research
I. Joint author, Fraenkel, Jack R.