- Siegfried Sassoon. Sherston's Progress: The Memoirs of George Sherston. Great Britain: Faber and Faber Limited, 1936.
- Siegfried Sassoon. Counter-Attack and Other Poems. New York: E.P. Dutton & Company, 1918.
- Siegfried Sassoon. The Old Huntsman and Other Poems. London: W. Heinemann, 1917.
- Patrick Campbell. Siegfried Sassoon: A Study of the War Poetry. North Carolina: McFarland & Company, Inc., 1935.
- Marcello Giovanelli. The Language of Siegfried Sassoon. Cham, Switzerland: Palgrave Studies in Language, Literature, and Style, 2022.
- "SASSOON, Siegfried, as Saul Kain.." Peter Harrington London. Accessed 27 July 2023. <https://www.peterharrington.co.uk/the-daffodil-murderer-150527.html>.
- Jean Moorcroft Wilson. "The Hermit of Heytesbury." The Guardian. 29 March 2003. Accessed 27 July 2023. <https://www.theguardian.com/books/2003/mar/29/featuresreviews.guardianreview28>.
- John Ezard. "Lost Sassoon poem reveals author's initial gung-ho view of war." The Guardian. 13 November 2004. Accessed 27 July 2023. <https://www.theguardian.com/uk/2004/nov/13/books.booksnews>.
- "Propaganda in World War One." The British Library. Accessed 27 July 2023. <https://www.bl.uk/world-war-one/themes/propaganda>.
- "The Unreturning." thefoxhuntingman on Tumblr. 2015. Accessed 28 July 2023. <https://thefoxhuntingman.tumblr.com/post/127806618373/siegfried-sassoon-religion>.