Theodore Stanton, The Woman Question in Europe. London, 1884.
Helen Campbell, Prisoners of Poverty, 1887. Prisoners of Poverty Abroad, 1889.
Woman's Work in America, edited by Annie Nathan Meyer. New York, 1891.
Sophia Jex-Blake, Medical Women. Edinburgh, 1871.
A. Huntley, Women and Medicine. London, 1886.
John Stuart Mill, Subjection of Women. London, 1869.
Eliza W. Farnham, Woman and her Era. New York, 1869.
Lester F. Ward, Dynamic Sociology, vol. i. pp. 597-664.
Maria S. Child, History and Condition of Women in various Ages and Nations. Boston, 1840.