1. Bynum, Caroline Walker. 2001. Metamorphosis and Identity. New York: Zone Books.
2. Chaucer, Geoffrey. 2008. The Riverside Chaucer, ed. Larry D. Benson. 3rd ed. Oxford: Oxford University Press.
3. Cooper, Lisa H. 2007. “The Poetics of Practicality.” In Oxford Twenty-First Century Approaches to Literature: Middle English, ed. Paul Strohm. Oxford: Oxford University Press: 491–505.
4. Daston, Lorraine and Katharine Park. 1998. Wonders and the Order of Nature 1150–1750. New York: Zone Books.
5. Dismal Science: Chaucer and Gower on Alchemy and Economy;Epstein Robert;Studies in the Age of Chaucer,2014