Pfaff, R. W. (1998). Liturgical calendars, saints, and services in medieval England. Ashgate.
Chicago-referens (17:e uppl.)Pfaff, Richard William. Liturgical Calendars, Saints, and Services in Medieval England. Aldershot, Hampshire: Ashgate, 1998.
MLA-referens (8:e uppl.)Pfaff, Richard William. Liturgical Calendars, Saints, and Services in Medieval England. Ashgate, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.