Goldmark, Josephine. Fatigue and Efficiency. New York, 1912.
Kelley, Florence. Some Ethical Gains through Legislation. New York, 1905.
Kneeland, G.J. Commercialized Prostitution in New York City. New York, 1913. Bureau of Social Hygiene Publications.
More, L.B. Life Earner's Budgets; A Study of Standards and Cost of Living in New York City. New York, 1907.
Roe, C.G. Panders and their White Slaves. Chicago, 1910.
Ryan, J.A. A Living Wage. New York, 1910.
Sanger, W.W. History of Prostitution. New York, 1913.
Seligman, E.R.A., ed. Social Evil. Ed. 2, rev. New York, 1912. Chap. i.
Streightoff, F.H. Standard of Living among Industrial People of America. Boston, 1911.
U.S. Bureau of Labor. Women and Child Wage-Earners in the United States. Washington, 1911-12. Vols. 5, 15.