Martin, Margaret (2001). A long look at nature: the North Carolina State Museum of Natural Sciences. Chapel Hill: Published for the North Carolina State Museum of Natural Sciences by the University of North Carolina Press. pp. 7, 26–27. ISBN0807849855. OCLC47050099.
Lakwete, Angela (2003). Inventing the cotton gin: machine and myth in antebellum America. Baltimore: The Johns Hopkins University Press. pp. 53, 177–192. ISBN0801873940. OCLC51445810.