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Tucker, Brandon. (2010). Yersinia pestis. Missouri Science and Technology Biological Sciences. Retrieved from: http://web.mst.edu/~microbio/BIO221_2010/Y_pestis.html
Yersinia pestis. (Feb. 9, 2011). Department of Health and Human Services. Centers for Disease Control and Prevention. Retrieved from: http://www.cdc.gov/pulsenet/pathogens_pages/yersinia.htm
Weapons of Mass Destruction (WMD) Plague (Yersinia pestis) (2000-2013). Global Security.org. Retrieved from: http://www.globalsecurity.org/wmd/intro/bio_plague.htm
Riedel, Stefan. (2005). Plague: from natural disease to bioterrorism. Retrieved from: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1200711/
Medrano-Cabral, S. The Influence of Plague on Art from the Late 14th to the 17th Century. Retrieved from: http://entomology.montana.edu/historybug/YersiniaEssays/Medrano.htm
Tucker, Brandon. (2010). Yersinia pestis. Missouri Science and Technology Biological Sciences. Retrieved from: http://web.mst.edu/~microbio/BIO221_2010/Y_pestis.html