^Natural Therapies for Mitral Valve Prolapse by Ronald L. Hoffman (1999, Spiral)ISBN 9780879837655 (revised Jan 2021)
^Hoffman, Ronald (2014). Natural Therapies for Mitral Valve Prolapse, KEATS PUB C/O NTC/CONTEMPORARY. BiggerBooks. ISBN 9780879837655 (revised May 2022)
^Ronald L. HoffmanNatural Therapies for Mitral Valve Prolapse, Mcgraw-hill Education. Amazon. ISBN 9780879837655 (revised Aug 2018)