Fraenkel, J. R., & Jack R. Fraenkel; Norman E. Wallen. (2006). How to design and evaluate research in education. Boston: McGraw-Hill.
Čikaški stil citiranjaFraenkel, Jack R., i Jack R. Fraenkel; Norman E. Wallen. How to Design and Evaluate Research in Education. Boston: McGraw-Hill, 2006.
MLA način citiranjaFraenkel, Jack R., i Jack R. Fraenkel; Norman E. Wallen. How to Design and Evaluate Research in Education. Boston: McGraw-Hill, 2006.
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