Cita APA (7a ed.)
Orem, R. (1974). Montessori: Her method and the movement. G.P.Putnam's sons.
Cita Chicago Style (17a ed.)
Orem, R.C. Montessori: Her Method and the Movement. New York: G.P.Putnam's sons, 1974.
Cita MLA (9a ed.)
Orem, R.C. Montessori: Her Method and the Movement. G.P.Putnam's sons, 1974.
Precaución: Estas citas no son 100% exactas.