Strayer, G. D., & Engelhardt, N. L. (1920). The classroom teacher at work in American schools. American Book company.
Citace podle Chicago (17th ed.)Strayer, George Drayton, a N. L. Engelhardt. The Classroom Teacher at Work in American Schools. New York: American Book company, 1920.
Citace podle MLA (8th ed.)Strayer, George Drayton, a N. L. Engelhardt. The Classroom Teacher at Work in American Schools. American Book company, 1920.
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