Stanford, G. (1977). Developping effective classroom groups: A practical guide for teachers. New York: Harper Publishing company.
Παραπομπή Chicago StyleStanford, Gene. Developping Effective Classroom Groups: A Practical Guide for Teachers. New York: Harper Publishing company, 1977.
Παραπομπή MLAStanford, Gene. Developping Effective Classroom Groups: A Practical Guide for Teachers. New York: Harper Publishing company, 1977.
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