Ferguson, E. A. (1969). Social work: An introduction (2d ed.). Lippincott.
Cita Chicago (17th ed.)Ferguson, Elizabeth A. Social Work: An Introduction. 2d ed. Philadelphia: Lippincott, 1969.
Cita MLA (8th ed.)Ferguson, Elizabeth A. Social Work: An Introduction. 2d ed. Lippincott, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.