Gaya APA
Fraenkel, J, R., Wallen, N, E. (2009).
How to design and evaluate research in education (7th).
New York:
McGraw-Hill Higher Education.
Gaya MLA
Fraenkel, Jack, R.., Wallen, Norman, E..
"How to design and evaluate research in education".
7th
New York:
McGraw-Hill Higher Education,
2009.
Buku.