APA (7e ed.) Bronvermelding

Williamson, M. A. 1. (1929). The social worker in a group. Harper.

Chicago (17e ed.) Bronvermelding

Williamson, Margaretta A. 1891. The Social Worker in a Group. New York: Harper, 1929.

MLA (9e ed.) Bronvermelding

Williamson, Margaretta A. 1891. The Social Worker in a Group. Harper, 1929.