and Correction of Vocal Faults. Genovex Music Group. 1994. ISBN 978-1-56593-940-0. Appelman, D. Ralph. The Science of VocalPedagogy: Theory and Application
歌唱對身體健康有正面的幫助,可以增加肺活量、降低憂鬱情緒、減輕壓力、增加免疫能力。 Appelman, Dudley Ralph. The science of vocalpedagogy: theory and application. Bloomington, IN: Indiana University Press.
胸腔 Dudley Ralph Appelman. Breathing for Singing. in The Science of VocalPedagogy: Theory and Application. 1967 [2021-07-31]. ISBN 9780253351104. (原始内容存档于2021-07-31)