"Zi Ran Men" by Master Liu De Ming (click here for PDF format)
"The Spirit of Martial Arts" by Karl Braganza (click here for PDF format)
"Xing Yi Quan Xue - The study of mind form boxing"
by Sun Lu Tang,
High View Publications 1993.
"The Root of Chinese Qigong"
by Dr Yang Jwing Ming,
YMAA Publication Center, 1997.
"Tai Chi Touchstones - Yang family secret transmissions"
by Douglas While,
Sweet Ch'i Press, 1983.
"Ninpo Wisdom for life"
by Masaaki Hatsumi,
Joe Maurantonio , Mushashin Press, 1998.
"Tai chi theory and martial power - Advanced Yang Style"
by Dr Yang Jwing Ming,
YMMA Publication Center, 1986.
"The Web That Has No Weaver"
by Ted Kaptchuk,
NTC Publishing Group, 2000.
"The Dragon Stretches its Claws - An illustrated training manual of Ba Gua Zhang"
by Liu Jing Ru and C.S. Tang.