Rujukan Auto_Union

  • Bruintjes, Jeroen. "Auto Union Type E—The Stillborn 1.5-litre car: Why it (Almost) did Exist"
  • Oswald, Werner (2001). Deutsche Autos 1920–1945, Band (vol) 2 (dalam bahasa German). Motorbuch Verlag. ISBN 3-613-02170-6. Selenggaraan CS1: Bahasa yang tidak dikenali (link)
  • Snellman, Leif. "The Early Auto Unions, From P-Wagen to A-type"
  • Wise, David Burgess. "Rumpler: One Aeroplane which Never Flew", in Northey, Tom, ed. World of Automobiles (London: Orbis, 1974), Vol. 17, p. 1964.<

Catatan

  1. ↑ "History of Audi AG". 
  2. ↑ Four Rings: The Audi Story. Audi AG. 1 August 2013. ISBN 978-3768826730. 
  3. ↑ "Mercedes speed record cars of the 1930s". DaimlerChrysler. Classic Driver.