Citazione Stile APA (7a Edizione)

Hartley, R. E. (1952). Growing through play: Experiences of Teddy and Bud. Columbia University Press.

Citazione stile Chigago Style (17a edizione)

Hartley, Ruth Edith. Growing Through Play: Experiences of Teddy and Bud. New York: Columbia University Press, 1952.

Citatione MLA (8a ed.)

Hartley, Ruth Edith. Growing Through Play: Experiences of Teddy and Bud. Columbia University Press, 1952.