Kienzle, Beverly Mayne (2012-11-22), Birkedal Bruun, Mette (ed.), "Preaching", The Cambridge Companion to the Cistercian Order (1 ed.), Cambridge University Press, pp. 245–257, doi:10.1017/cco9780511735899.022, ISBN978-1-107-00131-2, retrieved 2024-02-19
doi.org
Kienzle, Beverly Mayne (2012-11-22), Birkedal Bruun, Mette (ed.), "Preaching", The Cambridge Companion to the Cistercian Order (1 ed.), Cambridge University Press, pp. 245–257, doi:10.1017/cco9780511735899.022, ISBN978-1-107-00131-2, retrieved 2024-02-19