3Alfred MadeleyRichardson, The Mediaeval Modes : Their Melody and Harmony for the Use of the Modern Composer, H.W. Gray Company ; First edition (January 1, 1933).
7Harold StoneCPowers (1928 -2007 ) gO "Modes", in Stanley Sadie ed. , The New Grot~e Dictionnary of Musicand Musicians, London: Macmillan Publishers Ltd., 2001, vol. 16, p. 810.
8Harold Stone Powers '" Modes", in Stanley Sadie ed. , The New Grove Dictionnary of Music and Musk'ians, London : Macmillan Publishers Ltd. , 2001, vol. 16, pp. 814 -817.