Strayer, G. D., & Engelhardt, N. L. (1920). The classroom teacher at work in American schools. American Book company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStrayer, George Drayton, और N. L. Engelhardt. The Classroom Teacher at Work in American Schools. New York: American Book company, 1920.
एमएलए (8वां संस्करण) प्रशस्ति पत्रStrayer, George Drayton, और N. L. Engelhardt. The Classroom Teacher at Work in American Schools. American Book company, 1920.
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