Citazione Stile APA (7a Edizione)

Gettman, D. (1987). Basic Montessori: Learning activities for under-fives. C. Helm.

Citazione stile Chigago Style (17a edizione)

Gettman, David. Basic Montessori: Learning Activities for Under-fives. London: C. Helm, 1987.

Citatione MLA (9a ed.)

Gettman, David. Basic Montessori: Learning Activities for Under-fives. C. Helm, 1987.