APA (7th ed.) Citation

Yeon Hee Park, Gerrard, & Yeon Hwan Park. (1989). Tae kwon do: The ultimate reference guide to theworld's most popular martial art. Facts On File.

Chicago Style (17th ed.) Citation

Yeon Hee Park, Gerrard, and Yeon Hwan Park. Tae Kwon Do: The Ultimate Reference Guide to Theworld's Most Popular Martial Art. New York: Facts On File, 1989.

MLA (8th ed.) Citation

Yeon Hee Park, et al. Tae Kwon Do: The Ultimate Reference Guide to Theworld's Most Popular Martial Art. Facts On File, 1989.