[1] Arval, A.M. (1974) The Constitution and American Education. West Publishing Co., St. Paul.
[2] Leo, P. (1953) Church, State, and Freedom. The Beacon Press, Boston.
[3] Edgar, W.K. and Clifton, L.H., Eds. (1951) Readings in American Educational History. Appleton-Century-Crofts, New York.
[4] Lawrence, A.C. (1957) The Republic and the School: Horace Mann on the Education of Free Men. Teachers College Press, New York.