Fraenkel, J. R., & Wallen, N. E. (2006). How to design and evaluate research in education (6th ed.). Boston: McGraw-Hill.
Trích dẫn kiểu ChicagoFraenkel, Jack R., và Norman E. Wallen. How to Design and Evaluate Research in Education. 6th ed. Boston: McGraw-Hill, 2006.
MLA citiranjeFraenkel, Jack R., và Norman E. Wallen. How to Design and Evaluate Research in Education. 6th ed. Boston: McGraw-Hill, 2006.
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