APA (7th ed.) Citation

Holt, M., & Dienes, Z. P. (1973). Let's play math. Penguin Books.

Chicago Style (17th ed.) Citation

Holt, Michael, and Zoltan Paul Dienes. Let's Play Math. Middlesex, Eng: Penguin Books, 1973.

MLA (9th ed.) Citation

Holt, Michael, and Zoltan Paul Dienes. Let's Play Math. Penguin Books, 1973.