APA (7th ed.) Citation

Oon, O. Y. (2009). Advanced judo. Ippon.

Chicago Style (17th ed.) Citation

Oon, Oon Yeoh. Advanced Judo. [Place of publication not identified]: Ippon, 2009.

MLA (9th ed.) Citation

Oon, Oon Yeoh. Advanced Judo. Ippon, 2009.

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