Pevsner, Nikolaus; revised by Cherry, Bridget (2002). "Watford - Churches". The Buildings of England: Hertfordshire (2nd ed.). New Haven: Yale University Press. p. 385. ISBN9780300096118. Retrieved 30 December 2014.
"Guide to St Mary's Tombs"(PDF). Watford Museum. Watford Borough Council. Archived from the original(PDF) on 31 December 2014. Retrieved 27 December 2014.
"Guide to St Mary's Tombs"(PDF). Watford Museum. Watford Borough Council. Archived from the original(PDF) on 31 December 2014. Retrieved 27 December 2014.