"Appletons' Cyclopaedia of American Biography, Volume VI, Sunderland-Zurita." In Appletons' Cyclopaedia of American Biography, Volume VI, Sunderland-Zurita, edited by Wilson, James Grant and John Fiske. New York: D. Appleton & Co., 1888.
Spaulding, Thomas Marshall. Dictionary of American Biography. 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.
Hollis, C. Carroll. "Whitman and William Swinton: A Co-operative Friendship." American Literature 30, no. 4 (1959): 425-449.
Whitman, Walt. "Letter to John Swinton, February 2, 1863." Walt Whitman: The Correspondence 1, (1961): 75-76.
Whitman, Walt. "Letter to Louisa Van Velsor Whitman, June 10, 1864." Walt Whitman: The Correspondence 1, (1961): 232-233.
Whitman, Walt. "Letter to Louisa Van Velsor Whitman, December 4, 1866." Walt Whitman: The Correspondence 1, (1961): 299-300.
Traubel, Horace. "Intimate with Walt: Selections from Whitman's Conversations with Horace Traubel, 1888-1892." In Intimate with Walt: Selections from Whitman's Conversations with Horace Traubel, 1888-1892, edited by Schmidgall, Gary. Iowa City: University of Iowa Press, 2001.
Belasco, Susan. "From the Field: Walt Whitman's Periodical Poetry." American Periodicals 14, no. 2 (2004): 247-59.
Lause, Mark A. The Antebellum Crisis and America's First Bohemians. Kent, OH: Kent State University Press, 2009.