Williamson, M. A. 1. (1929). The social worker in a group. Harper.
Cita Chicago (17th ed.)Williamson, Margaretta A. 1891. The Social Worker in a Group. New York: Harper, 1929.
Cita MLA (9th ed.)Williamson, Margaretta A. 1891. The Social Worker in a Group. Harper, 1929.
Atenció: Aquestes cites poden no estar 100% correctes.