.The encyclopaedia britanneca : a dictionary of arts, scienecs, literature and general information. vol. 13,. Harmony to Hurstmonceaux..Cambridge University Press,,1910..
Edward Aldwell (The Curtis Institute of Music, Mannes College of Music), Carl Schachter (Mannes College of Music, The Juilliard School), Allen Cadwallader (Oberlin Conservatory of Music)..Harmony & voice leading /.,.
Edward Aldwell (The Curtis Institute of Music, Mannes College of Music), Carl Schachter (Mannes College of Music, The Juilliard School), Allen Cadwallader (Oberlin Conservatory of Music)..,.