APA (7th ed.) Citation

Strayer, G. D., & Engelhardt, N. L. (1920). The classroom teacher at work in American schools. American Book company.

Chicago Style (17th ed.) Citation

Strayer, George Drayton, and N. L. Engelhardt. The Classroom Teacher at Work in American Schools. New York: American Book company, 1920.

MLA (8th ed.) Citation

Strayer, George Drayton, and N. L. Engelhardt. The Classroom Teacher at Work in American Schools. American Book company, 1920.