變更

* Warrack, J. & West, E. (1996). ''The Concise Oxford Dictionary of Opera - 3rd Edition''. New York, NY: Oxford University Press. Pages 115-116. ISBN 0-19-280028-0.

* Kennedy M.(2004). ''The Concise Oxford Dictionary of Music - 4th Edition''. New York, NY: Oxford University Press. Pages 182-183. ISBN 0-19-860884-5.