Marques, Susana Moreira (13 October 2015). Now and At the Hour of Our Death (in английский). Буссинаби: Sanches, Julia. And Other Stories. ISBN978-1-908276-62-9. {{cite book}}: Check date values in: |date= (квеки)
Warraich, Haider (2017). Modern Death: How Medicine Changed the End of Life. St. Martin's Press. ISBN978-1250104588.
Schels, Walter; Lakotta, Beate. "Before and After Death". LensCulture.com. Архивация оригинал (11 October 2014). Халагьи 19 September 2016. {{cite web}}: Check date values in: |access-date= and |archive-date= (квеки) Interviews with people dying in hospices, and portraits of them before, and shortly after, death.
U.S. Census. "Causes of Death 1916". AntiqueBooks.net (scanns). Архивация оригинал (18 September 2004). Халагьи 19 September 2016. {{cite web}}: Check date values in: |access-date= and |archive-date= (квеки) How the medical profession categorized causes of death.
Wald, George. "The Origin of Death". ElijahWald.com. A biologist explains life and death in different kinds of organisms, in relation to evolution.