Fowler 1961, pp. 139–140. Fowler, Kenneth (1961). Henry of Grosmont, First Duke of Lancaster, 1310–1361 (Tese de doutorado). Leeds: Universidade de Leeds. OCLC1064545536
Rogers 2004, p. 95. Rogers, Clifford J. (2004). Bachrach, Bernard S.; DeVries, Kelly; Rogers, Clifford J, ed. «The Bergerac Campaign (1345) and the Generalship of Henry of Lancaster». Woodbridge: Boydell & Brewer. Journal of Medieval Military History. II. ISBN978-1-84383-040-5. ISSN0961-7582 !CS1 manut: Nomes múltiplos: lista de editores (link)
Fowler 1961, pp. 143–144. Fowler, Kenneth (1961). Henry of Grosmont, First Duke of Lancaster, 1310–1361 (Tese de doutorado). Leeds: Universidade de Leeds. OCLC1064545536
Deaux 1969, p. 122. Deaux, George (1969). The Black Death, 1347. Londres: Hamilton. OCLC242352826
Rogers 2004, p. 107. Rogers, Clifford J. (2004). Bachrach, Bernard S.; DeVries, Kelly; Rogers, Clifford J, ed. «The Bergerac Campaign (1345) and the Generalship of Henry of Lancaster». Woodbridge: Boydell & Brewer. Journal of Medieval Military History. II. ISBN978-1-84383-040-5. ISSN0961-7582 !CS1 manut: Nomes múltiplos: lista de editores (link)