Flat-four engine (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Flat-four engine" in English language version.

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american-automobiles.com

archive.org

  • Nunney, M. J. (2007). Light and Heavy Vehicle Technology. Butterworth-Heinemann. p. 13. ISBN 978-0-7506-8037-0.
  • Wilson, Hugo (1995). "The A–Z of Motorcycles". The Encyclopedia of the Motorcycle. London, UK: Dorling Kindersley. ISBN 0-7513-0206-6.

books.google.com

caranddriver.com

carsguide.com.au

citroenet.org.uk

evo.co.uk

fhi.co.jp

hotcars.com

motorauthority.com

  • Engine article [1]

motortrend.com

porsche.com

superstreetonline.com

theglobeandmail.com

web.archive.org