- Harry LangdonWilliam Schelly · Metuchen, NJ: Scarecrow Press, 1982
- The Silent Films of Harry Langdon, 1923-1928Neibaur, James L. · Lanham, MD: Scarecrow Press, 2012 · ISBN: 0810885301
- Little Elf: A Celebration of Harry Langdon-Harter, Chuck & Michael J Hayde · BearManor Media, 2012 · ISBN: 1593932782
- Harry Langdon: The Comedian As Metleur-En-SceneJoyce Rheuban · Madison, NJ: Farleigh Dickinson University Press, 1983 · ISBN: 9780838631119
- Stan & Ollie (2018)
- Film Fan Monthly (US)"FFM interviews Madge Evans"December 1972 · Iss. # 138, pg. 9 · by: Maltin, Leonard
- Films in Review (US)"Harry Langdon"April 1, 1992 · Vol. XLIII, Iss. 3/4, pg. 97-99 · by: Harry Langdon (nephew)
- Variety (US)"Harry Langdon"December 27, 1944 · pg. 39:4
- New York Times (US)"Harry Langdon, 60, Screen Comedian. Film 'Dead-Pan,' Who Began With Mack Sennett, Dies--Once Paid $7,500 a Week"December 23, 1944 · pg. 13:3
- Moving Picture World (US)"Harry Langdon Burned"December 24, 1927 · pg. 23
- Moving Picture World (US)"Dictograph Used on Langdon Film"December 24, 1927 · pg. 21
- Jeunesse Cinéma (FR)"Le musée du rire"August 1965 · Iss. 92, pg. 44
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