Ward, J. B. (1923). Gregorian chant: According to the principles of Dom André Mocquereau of Solesmes. The Catholic Education Press.
Chicago-referens (17:e uppl.)Ward, Justine Bayard. Gregorian Chant: According to the Principles of Dom André Mocquereau of Solesmes. Washington, D. C.: The Catholic Education Press, 1923.
MLA-referens (8:e uppl.)Ward, Justine Bayard. Gregorian Chant: According to the Principles of Dom André Mocquereau of Solesmes. The Catholic Education Press, 1923.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.