Gilchrist, R. S. (1974). Curriculum Development: A humanized systems approach. Phi Delta Kappa.
Chicago-čujuhus (17. p.)Gilchrist, Robert S. Curriculum Development: A Humanized Systems Approach. USA: Phi Delta Kappa, 1974.
MLA-čujuhus (9. p.)Gilchrist, Robert S. Curriculum Development: A Humanized Systems Approach. Phi Delta Kappa, 1974.
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