Richard W. Pfaff, The Liturgy in Medieval England: A History (2009). Journal of the Society for Musicology in Ireland, [S. l.], v. 7, p. 47–53, 2012. DOI: 10.35561/JSMI07116. Disponível em: https://www.jsmi.musicologyireland.ie/index.php/journal/article/view/95. Acesso em: 15 dec. 2025.