Cita APA (7th ed.)

Cohen, D. (1993). The development of play (2nd ed.). Routledge.

Cita Chicago (17th ed.)

Cohen, David. The Development of Play. 2nd ed. London: Routledge, 1993.

Cita MLA (9th ed.)

Cohen, David. The Development of Play. 2nd ed. Routledge, 1993.