Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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