"Vital Signs: Trends in State Suicide Rates - United States, 1999-2016 and Circumstances Contributing to Suicide - 27 States, 2015."Stone, Deborah M., Thomas R. Simon, Katherine A. Fowler, Scott R. Kegler, Keming Yuan, Kristin M. Holland, Asha Z. Ivey-Stephenson, Alex E. Crosby. "Vital Signs: Trends in State Suicide Rates - United States, 1999-2016 and Circumstances Contributing to Suicide - 27 States, 2015." Morbidity and Mortality Weekly Report 67, no. 22 (June 2018): 617-24.