APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Holt, Michael, and Zoltan P. Dienes. Let's Play Maths. London: Penguin Books, 1973.

MLA (8th ed.) Citation

Holt, Michael, and Zoltan P. Dienes. Let's Play Maths. Penguin Books, 1973.

Warning: These citations may not always be 100% accurate.