Cita APA (7th ed.)

Cohen, D. (2006). The development of play (3rd ed.). Routledge.

Cita Chicago (17th ed.)

Cohen, David. The Development of Play. 3rd ed. London: Routledge, 2006.

Cita MLA (9th ed.)

Cohen, David. The Development of Play. 3rd ed. Routledge, 2006.