Sheridan, Matthew; Rainville, Raymond R.; King, Anna; Royster, Brian; Giuseppe M., Fazari (c2019), „gas chamber“, Historical dictionary of American criminal justice, Lanham, MD; Boulder, CO; New York, NY, London: Rowman & Littlefield, str. 146, ISBN9781538111413, https://books.google.sk/books?id=qo2ADwAAQBAJ&pg=PA146, dost. 2021-11-30