Gaya APA

Fraenkel, J, R., Wallen, N, E. (2008). How to Design and Evaluate Research in Education (7nd Ed.). New York: McGraw-Hill.

Gaya MLA

Fraenkel, Jack, R.., Wallen, Norman, E.. "How to Design and Evaluate Research in Education". 7nd Ed. New York: McGraw-Hill, 2008. Text.