References
^ Jwing-Ming Yang (1998). 9781886969575, YMAA Publication Center. ISBN 9781886969575 (revised Dec 2013)^ Qigong Health and Healing: Qigong for Health and Martial Arts : Exercises and Meditation by Jwing-Ming Yang (1998, Paperback, Revised) ISBN 9781886969575 (revised May 2018)
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