APA (7th ed.) Citation

Nakamura, T., & Grill, T. Karate technique and spirit.

Chicago Style (17th ed.) Citation

Nakamura, Tadashi, and Tom Grill. Karate Technique and Spirit.

MLA (9th ed.) Citation

Nakamura, Tadashi, and Tom Grill. Karate Technique and Spirit.

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