Stephens, L. S. (1974). The teacher's guide to open education. Holt, Rinehart and Winston.
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Chicago-čujuhus (17. p.)
Stephens, Lillian S. The Teacher's Guide to Open Education. New York: Holt, Rinehart and Winston, 1974.
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MLA-čujuhus (9. p.)
Stephens, Lillian S. The Teacher's Guide to Open Education. Holt, Rinehart and Winston, 1974.
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