APA (7th ed.) Citation

Horn, J. L. (1923). The American elementary school: A study in fundamental principles. The Century co..

Chicago Style (17th ed.) Citation

Horn, John Louis. The American Elementary School: A Study in Fundamental Principles. New York, London: The Century co., 1923.

MLA (9th ed.) Citation

Horn, John Louis. The American Elementary School: A Study in Fundamental Principles. The Century co., 1923.