ISBN 0-7914-2653-X*Albert Liu, "Nei Jia Quan: Internal Martial Arts", North Atlantic Books, 2004*"Journal of Asian Martial Arts" Volume 16, No.
ISBN 0-7914-2653-X* Albert Liu, "Nei Jia Quan: Internal Martial Arts", North Atlantic Books, 2004* "Journal of Asian Martial Arts" Volume 16, No.