Willis, G. G. (1994). A history of early Roman liturgy to the death of Pope Gregory the Great. publ. for the Henry Bradshaw Society by Boydell Press.
Chicago Style (17th ed.) CitationWillis, Geoffrey Grimshaw. A History of Early Roman Liturgy to the Death of Pope Gregory the Great. London [u.a.]: publ. for the Henry Bradshaw Society by Boydell Press, 1994.
MLA (8th ed.) CitationWillis, Geoffrey Grimshaw. A History of Early Roman Liturgy to the Death of Pope Gregory the Great. publ. for the Henry Bradshaw Society by Boydell Press, 1994.
Warning: These citations may not always be 100% accurate.