Boomhower 1999; Farrell 2009, hlm. 4–5 Boomhower, Ray E. (1999). "Slaughterhouse-Five: Kurt Vonnegut Jr". Traces of Indiana and Midwestern History. Indiana Historical Society. 11 (2): 42–47. ISSN1040-788X. Farrell, Susan E. (2009). Critical Companion to Kurt Vonnegut: A Literary Reference to His Life and Work. Infobase Publishing. ISBN978-1-4381-0023-4.
Farrell 2009, hlm. 5; Boomhower 1999 Farrell, Susan E. (2009). Critical Companion to Kurt Vonnegut: A Literary Reference to His Life and Work. Infobase Publishing. ISBN978-1-4381-0023-4. Boomhower, Ray E. (1999). "Slaughterhouse-Five: Kurt Vonnegut Jr". Traces of Indiana and Midwestern History. Indiana Historical Society. 11 (2): 42–47. ISSN1040-788X.
Boomhower 1999; Farrell 2009, hlm. 6–7. Boomhower, Ray E. (1999). "Slaughterhouse-Five: Kurt Vonnegut Jr". Traces of Indiana and Midwestern History. Indiana Historical Society. 11 (2): 42–47. ISSN1040-788X. Farrell, Susan E. (2009). Critical Companion to Kurt Vonnegut: A Literary Reference to His Life and Work. Infobase Publishing. ISBN978-1-4381-0023-4.
Vonnegut, Kurt (April 6, 2006). ""Kurt Vonnegut"". Bookworm (Wawancara). Wawancara dengan Michael Silverblatt. Santa Monica, California: KCRW. Diakses tanggal October 6, 2015.