American Educational Research Association & Mitzel, H. E. (1982). Encyclopedia of educational research (5th ed.). Free Press.
Citace podle Chicago (17th ed.)American Educational Research Association a Harold E. Mitzel. Encyclopedia of Educational Research. 5th ed. New York: Free Press, 1982.
Citace podle MLA (9th ed.)American Educational Research Association a Harold E. Mitzel. Encyclopedia of Educational Research. 5th ed. Free Press, 1982.
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