Παραπομπή APA

Biddle, B. J., & Ellena, W. J. (1964). Contemporary research on teacher effectiveness. New York: Holt, Rinehart and Winston.

Παραπομπή Chicago Style

Biddle, Bruce J., and William J. Ellena. Contemporary Research On Teacher Effectiveness. New York: Holt, Rinehart and Winston, 1964.

Παραπομπή MLA

Biddle, Bruce J., and William J. Ellena. Contemporary Research On Teacher Effectiveness. New York: Holt, Rinehart and Winston, 1964.

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