FRYMIER, J. R. (1965). The nature of educational method. Charles E. Merrill.
Chicago-čujuhus (17. p.)FRYMIER, Jack R. The Nature of Educational Method. Columbus: Charles E. Merrill, 1965.
MLA-čujuhus (9. p.)FRYMIER, Jack R. The Nature of Educational Method. Charles E. Merrill, 1965.
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