Gaya APA
Fraenkel, J, R., Wallen, N, E. (2012).
How to Design and Evaluate Research in Education (Ed. 9.).
New York:
McGraw Hill.
Gaya MLA
Fraenkel, Jack, R.., Wallen, Norman, E,.
"How to Design and Evaluate Research in Education".
Ed. 9.
New York:
McGraw Hill,
2012.
Text.