Gunn, Thomas Butler. "Diaries, Vol. 8." Diaries, Vol. 8. Missouri History Museum. (1856-1-1).
WORKS ABOUT - Mackenzie, Robert
Gunn, Thomas Butler. "Diaries, Vol. 10." Diaries, Vol. 10. Missouri History Museum. (1858-1-1).
Gunn, Thomas Butler. "Diaries, Vol. 13." Diaries, Vol. 13. Missouri History Museum. (1860-1-1).
Gunn, Thomas Butler. "Diaries, Vol. 15." Diaries, Vol. 15. Missouri History Museum. (1861-1-1).
Gardette, Charles Desmarais and Robert Shelton Mackenzie. The Whole Truth in the Question of "The Fire Fiend": Between Dr. R. Shelton Mackenzie and C.D. Gardette; Briefly stated by the Latter. Philadelphia: Sherman & Co. (1864-1-1).
A. B.. "Curiosities of Criticism." New York Saturday Press. (1866-1-20).
Haynes, John Edward. Pseudonyms of Authors: Including Anonyms and Initialisms. New York. (1882-1-1).
Stylus. "Our New York Letter." The Literary World: A Monthly Review of Current Literature. (1886-2-20).
English, Thomas Dunn. "That Club at Pfaaf's [sic]." The Literary World. (1886-6-12).
Wilson, James Grant and John Fiske. Appletons' Cyclopaedia of American Biography, Volume IV, Lodge-Pickens. New York: D. Appleton & Co. (1888-1-1).
Winter, William. Old Friends; Being Literary Recollections of Other Days. New York: Moffat, Yard and Company. (1909-1-1).
Baugh, Albert C.. Robert Shelton Mackenzie. Base Set. American Council of Learned Societies, 1928-1936. Reproduced in <cite>Biography Resource Center</cite>. Farmington Hills, Mich.: Thomson Gale, 2006. http://www.galenet.com/servlet/BioRC. (1928-1-1).
Clark, George Pierce. "'Saerasmid,' an Early Promoter of Walt Whitman." American Literature. (1955-5-1). 259-262.