Worship music: a concise dictionary (Liturgical Press, 2000), p. 18. Wellesz, Egon. New Oxford History of Music Vol II: Early Medieval Music up to 1300
- 12 images plus a short history(页面存档备份,存于互联网档案馆) Current Liturgical Calendar Complete Music Schedule Historical documents on the parish(页面存档备份,存于互联网档案馆)