Wittrock, M. (1970). Evalution of Instruction. Holt, Rinehart and Winston, Inc.
Čikaški stil citiranjaWittrock, M.C. Evalution of Instruction. New York: Holt, Rinehart and Winston, Inc, 1970.
MLA način citiranjaWittrock, M.C. Evalution of Instruction. Holt, Rinehart and Winston, Inc, 1970.
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