(en) United States Congress, Biographical Directory of the American Congress, 1774-1961: The Continental Congress, September 5, 1774, to October 21, 1788 and the Congress of the United States, from the First to the Eighty-sixth Congress, March 4, 1789, to January 3, 1961, Inclusive, U.S. Government Printing Office, (lire en ligne), p. 1260.
(en) United States Congress, A Biographical Congressional Directory, 1774-1903, U.S. Government Printing Office, (lire en ligne), p. 681.
(en) United States Congress, Official Congressional Directory, U.S. Government Printing Office, (lire en ligne), p. 21.
(en) United States Congress House Committee on Interstate and Foreign Commerce, 180 Years of Service: A Brief History of the Committee on Interstate and Foreign Commerce, U.S. House of Representatives, December 1975, U.S. Government Printing Office, (lire en ligne), p. 61.
(en) United States Congress, James R. Mann: Memorial Addresses Delivered in the House of Representatives of the United States in Memory of James R. Mann, Late a Representative from Illinois, Sixty-seventh Congress, January 14, 1923, U.S. Government Printing Office, (lire en ligne), p. 101.
(en) United States Congress, Official Congressional Directory, U.S. Government Printing Office, (lire en ligne), p. 23.
(en) Herbert F. Margulies, « James R. Mann: The Illinois Years », Illinois Historical Journal, vol. 90, no 3, , p. 191–210 (ISSN0748-8149, lire en ligne, consulté le ).
(en) L. Ethan Ellis, « James Robert Mann: Legislator Extraordinary », Journal of the Illinois State Historical Society (1908-1984), vol. 46, no 1, , p. 28–44 (ISSN0019-2287, lire en ligne, consulté le )
jstor.org
(en) Herbert F. Margulies, « James R. Mann: The Illinois Years », Illinois Historical Journal, vol. 90, no 3, , p. 191–210 (ISSN0748-8149, lire en ligne, consulté le ).
(en) L. Ethan Ellis, « James Robert Mann: Legislator Extraordinary », Journal of the Illinois State Historical Society (1908-1984), vol. 46, no 1, , p. 28–44 (ISSN0019-2287, lire en ligne, consulté le )
newspaperarchive.com
(en) « Suffragists Lose Fight in the House », The New York Times, , p. 1 (lire en ligne)
newspapers.com
(en) "". . Washington. December 1, 1922. p. 1., « James R. Mann Dies in Washington Home After Week's Illness, Ending in Pneumonia », The New York Times, , p. 1 (lire en ligne)