Weigand, J. E. (1971). Developing teacher competencies. Prentice-Hall.
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Chicago-čujuhus (17. p.)
Weigand, James E. Developing Teacher Competencies. Englewood Cliffs, N.J.: Prentice-Hall, 1971.
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MLA-čujuhus (9. p.)
Weigand, James E. Developing Teacher Competencies. Prentice-Hall, 1971.
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