Rujukan Roda pemecah

  1. ↑ Abbott, Geoffrey (2007). What A Way To Go. New York: St. Martin's Griffin. m/s. 36. ISBN 978-0-312-36656-8. 
  2. ↑ Kerrigan, Michael (2001/2007). The Instruments of Torture. Guilford, Connecticut: Lyons Press. m/s. 180. ISBN 978-1-59921-127-5.  Check date values in: |date= (bantuan)
  3. ↑ Abbott ibid. m/s. 40–41, 47.  Missing or empty |title= (bantuan)
  4. ↑ Depicted in the contemporary woodcut An Aggravated Death Sentence, Germanisches Nationalmuseum, Nuremberg.
  5. ↑ Evans, Richard J. (9 May 1996). Rituals of Retribution: Capital Punishment in Germany 1600-1987. USA: Oxford University Press. m/s. 29. ISBN 978-0-19-821968-2.