Heffernan, T. J., & Matter, E. A. (2001). The liturgy of the medieval church. Published for The Consortium for the Teaching of the Middle Ages, by Medieval Institute Publications, Western Michigan University.

Heffernan, Thomas J., and E. Ann Matter. The Liturgy of the Medieval Church. Kalamazoo, Mich.: Published for The Consortium for the Teaching of the Middle Ages, by Medieval Institute Publications, Western Michigan University, 2001.

Heffernan, Thomas J., and E. Ann Matter. The Liturgy of the Medieval Church. Published for The Consortium for the Teaching of the Middle Ages, by Medieval Institute Publications, Western Michigan University, 2001.