Centers for Disease Control and Prevention. Rocky Mountain spotted fever (RMSF) statistics and epidemiology. http://www.cdc.gov/rmsf/stats/. Updated September 5, 2013. Accessed May 2016.
Centers for Disease Control and prevention. Rocky Mountain spotted fever (RMSF). http://www.cdc.gov/rmsf/. Updated November 21, 2013. Accessed April 2016.
State of California Health and Human Services Agency. Spotted Fever Group Rickettsia and Rocky Mountain Spotted Fever Fact Sheet. https://www.cdph.ca.gov/HealthInfo/discond/Documents/RMSFandSFGRFactSheet.pdf. Updated September 2014. Accessed April 2016.