Addams, J. (1981). Twenty years at Hull-House. New American Library.
Cita Chicago (17th ed.)Addams, Jane. Twenty Years at Hull-House. New York, Estados Unidos: New American Library, 1981.
Cita MLA (9th ed.)Addams, Jane. Twenty Years at Hull-House. New American Library, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.
