ISBN 0-8242-1007-7. Snyder, Howard A. Populist Saints: B.T. and Ellen Roberts and the First Free Methodists. Grand Rapids, Michigan: William B. Eerdmans Publishing
Roosevelt(2001)。 Clements, Kendrick A. The Presidencyof Woodrow Wilson(1992)。 Coletta, Paolo. The PresidencyofWilliamHowardTaft(1990)。 Cooper, John Milton The
[2022-03-17]. (原始内容存档于2021-04-16). California Secretary of State Report of Registration as of October 19, 2020 (PDF). Elections.cdn.sos.ca.gov. [2021-01-05]