APA-čujuhus (7. p.)
George, P. S. The Middle School: And Beyond. Association for Supervision and Curriculum Development.
Chicago-čujuhus (17. p.)
George, Paul S. The Middle School: And Beyond. Alexandria, EUA: Association for Supervision and Curriculum Development.
MLA-čujuhus (9. p.)
George, Paul S. The Middle School: And Beyond. Association for Supervision and Curriculum Development.
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