Orem, R. (1974). Montessori: Her method and the movement. G.P.Putnam's sons.
Lua i Stíl Chicago (17ú heag.)Orem, R.C. Montessori: Her Method and the Movement. New York: G.P.Putnam's sons, 1974.
Lua MLA (9ú heag.)Orem, R.C. Montessori: Her Method and the Movement. G.P.Putnam's sons, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.