Apel, Willi(1990).Gregorian Chant.Bloomington, IN:Indiana University Press.ISBN 0-253-20601-4.
Crocker, Richard(1977).The Early Medieval Sequence.University of California Press.ISBN 0-520-02847-3.
Hiley, David (1990). Chant. In Performance Practice: Music before 1600, Howard Mayer Brown and Stanley Sadie, eds., pp. 37-54. New York: W.W. Norton & Co. ISBN 0-393-02807-0
Hiley, David(1995).Western Plainchant: A Handbook.Clarendon Press.ISBN 0-19-816572-2.
Hoppin, Richard, ed.(1978).Anthology of Medieval Music.W. W. Norton & Company.ISBN 0-393-09080-9.
Hoppin, Richard(1978).Medieval Music.W. W. Norton & Company.ISBN 0-393-09090-6.
Le Mee, Catherine(1994).Chant : The Origins, Form, Practice, and Healing Power of Gregorian Chant.Harmony.ISBN 0-517-70037-9.
Mahrt, William P. (2000). Chant. In A Performer's Guide to Medieval Music, Ross Duffin, ed., pp. 1-22. Bloomington, IN: Indiana University Press. ISBN 0-253-33752-6
McKinnon, James, ed.(1990).Antiquity and the Middle Ages.Prentice Hall.ISBN 0-13-036153-4.
Neuls-Bates, Carol, ed.(1996).Women in Music.Boston:Northeastern University Press.ISBN 1-55553-240-3.
Parrish, Carl(1986).A Treasury of Early Music.Mineola, NY:Dover Publications, Inc..ISBN 0-486-41088-9.