"Appletons' Cyclopaedia of American Biography, Volume IV, Lodge-Pickens." In Appletons' Cyclopaedia of American Biography, Volume IV, Lodge-Pickens, edited by Wilson, James Grant and John Fiske. New York: D. Appleton & Co., 1888.
"In and about the City: Death of Charles I. Pfaff. Something about the Proprietor of the Once Famous "Bohemia."." New York Times, April 26, 1890, 2.
Hartt, Mary Bronson. 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.