Gaya APA

Fraenkel, J, R., wallen, N, E. (2003). How to design and evaluate research in education (Edisi 5). New York: McGrawHill Companies.

Gaya MLA

Fraenkel, Jack, R., wallen, Norman, E. "How to design and evaluate research in education". Edisi 5 New York: McGrawHill Companies, 2003. FKIP-Geografi.