Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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