Jessie Carney Smith: Helen Appo Cook. In: Notable Black American women, Book II. Gale Research Inc., Farmington Hills, MI 1996, ISBN 978-0-8103-9177-2, S.137–139 (archive.org).
Wanda A. Hendricks: Gender, Race, and Politics in the Midwest: Black Club Women in Illinois. Indiana University Press, Bloomington, IN 1998, ISBN 978-0-253-33447-3, S.18 (google.com).
David Levering Lewis: W. E. B. Du Bois, 1868–1919: Biography of a Race. Henry Holt and Company, New York City 1994, ISBN 978-1-4668-4151-2, S.219 (google.de).
National Federation of Afro-American Women (Hrsg.): Historical Records of Conventions of 1895–96 of the Colored Women of America. University of Chicago Library, 1902 (uchicago.edu [PDF]).
unc.edu
docsouth.unc.edu
W.E.B. DuBois: Some Efforts of American Negroes for Their Own Social Betterment. In: Third Conference for the Study of the Negro Problems. Atlanta University Press, Atlanta, GA 1898 (unc.edu).