APA (7th ed.) Citation

Hartley, R. E., Frank, L. K., & Goldenson, R. M. (1952). Understanding children's play. Routledge & Kegan Paul.

Chicago Style (17th ed.) Citation

Hartley, Ruth E., Lawrence K. Frank, and Robert M. Goldenson. Understanding Children's Play. London: Routledge & Kegan Paul, 1952.

MLA (8th ed.) Citation

Hartley, Ruth E., et al. Understanding Children's Play. Routledge & Kegan Paul, 1952.