Cita APA (7a ed.)

Richmond, M. E., & Hall, F. S. (1974). A study of nine hundred and eighty-five widows known to certain charity organization societies in 1910. Arno Press.

Cita Chicago Style (17a ed.)

Richmond, Mary Ellen, y Fred S. Hall. A Study of Nine Hundred and Eighty-five Widows Known to Certain Charity Organization Societies in 1910. New York: Arno Press, 1974.

Cita MLA (8a ed.)

Richmond, Mary Ellen, y Fred S. Hall. A Study of Nine Hundred and Eighty-five Widows Known to Certain Charity Organization Societies in 1910. Arno Press, 1974.