Cita APA (7a ed.)

Orem, R. C. (1971). Montessori today. Putnam's Sons.

Cita Chicago Style (17a ed.)

Orem, R. C. Montessori Today. New York: Putnam's Sons, 1971.

Cita MLA (9a ed.)

Orem, R. C. Montessori Today. Putnam's Sons, 1971.