Citazione Stile APA (7a Edizione)

Opie, I. A. (1993). The people in the playground. Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Opie, Iona Archibald. The People in the Playground. Oxford: Oxford University Press, 1993.

Citatione MLA (9a ed.)

Opie, Iona Archibald. The People in the Playground. Oxford University Press, 1993.