Bibliography
McNaught, W. G. (1893). 'Proceedings of the Musical Association'. London: Novello, Ewer and Co. 19: 35–51. ISSN 0958-8442. Retrieved 2010-02-26.
Don Michael Randel, 'Guido of Arezzo', The Harvard Biographical Dictionary of Music (Cambridge, MA: Belknap Press of Harvard University Press, 1996): 339-40.
