Citazione Stile APA (7a Edizione)

Barell, J. (1980). Playgrounds of our minds. Teachers College Press.

Citazione stile Chigago Style (17a edizione)

Barell, John. Playgrounds of Our Minds. New York: Teachers College Press, 1980.

Citatione MLA (9a ed.)

Barell, John. Playgrounds of Our Minds. Teachers College Press, 1980.