Rolls-Royce Phantom I (English Wikipedia)

Autos.ca: Motoring Memories - Hispano-Suiza, Vance Vance, Bill (12 March 2001). "Motoring Memories: Hispano-Suiza". Autos.ca. Orleans, Ontario, Canada: Canadian Driver Communications. Archived from the original on 7 July 2012. Retrieved 17 October 2011. Rolls-Royce later adopted this system under licence from Hispano and used it for many years.

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The Rolls-Royce, Wood, p. 9 Wood, Jonathan (2003) [1987]. The Rolls-Royce. Shire Album Series. Vol. 198 (2nd ed.). Princes Risborough, Buckinghamshire, UK: Shire Publications. ISBN 978-0-7478-0577-9. Retrieved 29 March 2012.
The Rolls-Royce, Wood, p. 10 Wood, Jonathan (2003) [1987]. The Rolls-Royce. Shire Album Series. Vol. 198 (2nd ed.). Princes Risborough, Buckinghamshire, UK: Shire Publications. ISBN 978-0-7478-0577-9. Retrieved 29 March 2012.

"1922 Rolls Royce Silver Ghost". Heritage Museum and Gardens. Heritage Museums & Gardens. Retrieved 2 July 2023.

Autos.ca: Motoring Memories - Hispano-Suiza, Vance Vance, Bill (12 March 2001). "Motoring Memories: Hispano-Suiza". Autos.ca. Orleans, Ontario, Canada: Canadian Driver Communications. Archived from the original on 7 July 2012. Retrieved 17 October 2011. Rolls-Royce later adopted this system under licence from Hispano and used it for many years.