Cita APA (7th ed.)

Millar, S. (1968). The psychology of play. Penguin Books.

Cita Chicago (17th ed.)

Millar, Susanna. The Psychology of Play. Baltimore: Penguin Books, 1968.

Cita MLA (9th ed.)

Millar, Susanna. The Psychology of Play. Penguin Books, 1968.