Silva, Cristobal. "New England Epidemiology." Miraculous Plagues: An Epidemiology of Early New England Narrative. : Oxford University Press, 2011-08-02. Oxford Scholarship Online. 2011-09-22. Date Accessed 24 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199743476.001.0001/acprof-9780199743476-chapter-1>.
Silva, C.(2011-08-02). New England Epidemiology. In Miraculous Plagues: An Epidemiology of Early New England Narrative. : Oxford University Press. Retrieved 24 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199743476.001.0001/acprof-9780199743476-chapter-1.
Silva, Cristobal. "New England Epidemiology." In Miraculous Plagues: An Epidemiology of Early New England Narrative. : Oxford University Press, 2011-08-02. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199743476.001.0001/acprof-9780199743476-chapter-1.
Silva C. New England Epidemiology. In: Silva C. Miraculous Plagues: An Epidemiology of Early New England Narrative. Oxford University Press; 2011. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199743476.001.0001/acprof-9780199743476-chapter-1. Accessed May 24, 2013.