Gaya APA

E., F, J, R, W, N. (2003). How to Design and Evaluate Research in Education Ed.5 (5). Australia: Mc Graw Hill.

Gaya MLA

E., Fraenkel, Jack, R.;, Wallen, Norman. "How to Design and Evaluate Research in Education Ed.5". 5 Australia: Mc Graw Hill, 2003. Text.