Brown, Stewart (24 March 2006). "Investing in Merseyside". Bus & Coach Professional. Archived from the original on 24 March 2006. Retrieved 14 July 2022.
"The First President". Buses. No. 791. Stamford: Key Publishing. 21 January 2021. pp. 38–39. Retrieved 17 November 2021.
proquest.com
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"Arriva hits the road with bus investment". The Northern Echo. Darlington. 27 May 1999. p. 10. ProQuest328831312. Arriva is investing a further £8m on 70 buses in the Yorkshire area of its operations, including 20 low-floor double deck ALX 400 buses, destined for the Leeds guided bus way project.
Brown, Stewart (24 March 2006). "Investing in Merseyside". Bus & Coach Professional. Archived from the original on 24 March 2006. Retrieved 14 July 2022.