- John Webster. The White Devil. London: A & C Black Limited, 1996.
- "Four Humors." 2012-04-09. 2012-08-19. <http://ancienthistory.about.com/cs/hippocrates/a/hippocraticmeds.htm>.
- "Oxford English Dictionary." 2012-08-15. <http://oed.com/>.
- "Essays and Articles on John Webster." 2010-06-02. 2012-08-12. <http://www.luminarium.org/sevenlit/webster/webessay.htm>.
- "The White Devil Lit Notes Page." 2012-11-12. <http://www.litnotes.co.uk/whitedevil.htm>.
- "John Webster Biography." 2012-11-28. <http://www.imagi-nation.com/moonstruck/clsc27.html>.