Peirce, C. S., "Letter, Peirce to A. Marquand", 1886, W 5:541–3, Google Preview. Zie Burks, Arthur W., "Review: Charles S. Peirce, The new elements of mathematics", Bulletin of the American Mathematical Society v. 84, n. 5, 1978, p. 913–18, zie 917. PDF Eprint.
"Peirce, Charles Sanders", The National Cyclopaedia of American Biography, v. 8, 1898, p. 409.
Weiss, Paul, "Peirce, Charles Sanders" in the Dictionary of American Biography, 1934. ArisbeEprint. Gearchiveerd op 3 november 2013.
projecteuclid.org
Peirce, C. S., "Letter, Peirce to A. Marquand", 1886, W 5:541–3, Google Preview. Zie Burks, Arthur W., "Review: Charles S. Peirce, The new elements of mathematics", Bulletin of the American Mathematical Society v. 84, n. 5, 1978, p. 913–18, zie 917. PDF Eprint.