(en) Franz Schulze; Kevin Harrington, «Harold Washington Library Center», Chicago's Famous Buildings: Fifth Edition - The University of Chicago Press (consulté le ).
School days at Rugby; Thomas Hughes; Boston: Ticknor and Fields, 1859. (OCLC8299345) Tom Brown at Oxford; Thomas Hughes; Cambridge; London: Macmillan and Co., 1861. (OCLC20553570)
Manuel Neri; Pierre Restany; San Francisco: J. Berggruen Gallery, 1984. (OCLC11755948)
Roland Ginzel; Illinois State Museum; Springfield, Ill.: Illinois State Museum, 1975. (OCLC49341301)