APA

Montessori M., Orem R. C., . (19661965). A Montessori handbook: "Dr. Montessori's own handbook.". New York: Putnam.

Chicago

Montessori Maria, Orem Reginald Calvert, . 19661965. A Montessori handbook: "Dr. Montessori's own handbook.". New York: Putnam.

Harvard

Montessori M., Orem R. C., . (19661965). A Montessori handbook: "Dr. Montessori's own handbook.". New York: Putnam.

MLA

Montessori Maria, Orem Reginald Calvert, . A Montessori handbook: "Dr. Montessori's own handbook.". New York: Putnam. 19661965.