History of Taekwondo" Global Taekwondo 2003 (English) Kyo Yoon Lee A Guide to Taekwondo 1996 (English) Kyo Yoon Lee Kukkiwon 25th Anniversary Text 1997 (Korean) Un Yong Kim Kukkiwon Textbook 2006 (English/Korean) Um Woon Kyu Beginning Moo Duk Kwan Tae Kwon Do Korean Art of Self-Defense Volume 1 by Richard Chun. Hancock, J. and Plyler, J. (2004). The International Tangsoodo Alliance Official Instructor's Manual, Revised Edition. Guthrie, KY: International Tangsoodo Alliance. External links Moo Duk Kwan History World Moo Duk Kwan South Korean martial arts