Lua APA (7ú heag.)
Fraenkel, J. R., & Wallen, N. E. (2003). How to design and evaluate research in education (5th ed.). McGraw-Hill Higher Education.
Lua i Stíl Chicago (17ú heag.)
Fraenkel, Jack R., agus Norman E. Wallen. How to Design and Evaluate Research in Education. 5th ed. Boston: McGraw-Hill Higher Education, 2003.
Lua MLA (9ú heag.)
Fraenkel, Jack R., agus Norman E. Wallen. How to Design and Evaluate Research in Education. 5th ed. McGraw-Hill Higher Education, 2003.
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