Optare Sigma (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Optare Sigma" in Simple English language version.

Last modified: 12:44:50, 2 August 2026 (UTC)

Ref.Un. Ref.Website

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3^rd place

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3^rd place

archive.org (Global: 6^th place; Simple English: 3^rd place)

Cole, Martin (15 April 1994). "Vehicle launch: Optare Sigma Dennis Lance". Bus & Coach Buyer. No. 251. Spalding. p. 40. Retrieved 27 July 2024.

MacLennan, Calum (15 September 2022). Nottingham Buses in the 1990s. Amberley Publishing Limited. ISBN 978-1-3981-0917-9. Retrieved 6 February 2025.
Devoy, David (15 June 2019). Strathtay Scottish Buses. Amberley Publishing Limited. ISBN 978-1-4456-9128-2. Retrieved 6 February 2025.
Jenkinson, Keith A. (15 September 2023). 120 Years of Dennis Buses. Amberley Publishing Limited. ISBN 978-1-4456-6655-6. Retrieved 6 February 2025.