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- Patrick R. Osborn and Marc Romanych. The Hindenburg Line. Oxford: Osprey Publishing, 2016.
- "Siegfried Germanic literary hero." Britannica. Accessed 18 July 2023. <https://www.britannica.com/topic/Siegfried>.
- "Breaking the Hindenburg Line: The capture of St Quentin Canal." The History Press. Accessed 18 July 2023. <https://www.thehistorypress.co.uk/articles/breaking-the-hindenburg-line-the-capture-of-st-quentin-canal/>.
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