APA (7th ed.) Citation

Engelhardt, N. L. (1941). Portfolio: A elementary school classrooms. Bureau of Publications, Teachers College, Columbia university.

Chicago Style (17th ed.) Citation

Engelhardt, N. L. Portfolio: A Elementary School Classrooms. New York: Bureau of Publications, Teachers College, Columbia university, 1941.

MLA (9th ed.) Citation

Engelhardt, N. L. Portfolio: A Elementary School Classrooms. Bureau of Publications, Teachers College, Columbia university, 1941.