APA (7th ed.) Citation

Yeo, A. (2007). Are you the king or are you the joker?: Play math for young children. World Scientific.

Chicago Style (17th ed.) Citation

Yeo, Adrian. Are You the King or Are You the Joker?: Play Math for Young Children. Hackensack, N.J.: World Scientific, 2007.

MLA (9th ed.) Citation

Yeo, Adrian. Are You the King or Are You the Joker?: Play Math for Young Children. World Scientific, 2007.

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