How to design and evaluate research in education

FRAENKEL, Jack R. - WALLEN, Norman E. - HYUN, Helen H. How to design and evaluate research in education. Ninth edition. New York : McGraw-Hill Education, [2015]. ©2015. xxviii, 640 stran, A-16, G-9, C-1, I-10. ISBN 978-1-259-25392-8.