Perry, W. (2007). Sound medicine: The complete guide to healing with the human voice. New Page Books.
Cita Chicago (17th ed.)Perry, Wayne. Sound Medicine: The Complete Guide to Healing with the Human Voice. New Jersey: New Page Books, 2007.
Cita MLA (9th ed.)Perry, Wayne. Sound Medicine: The Complete Guide to Healing with the Human Voice. New Page Books, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.