Ferguson, E. A. (1969). Social work: An introduction (2d ed.). Lippincott.
Lua i Stíl Chicago (17ú heag.)Ferguson, Elizabeth A. Social Work: An Introduction. 2d ed. Philadelphia: Lippincott, 1969.
Lua MLA (8ú heag.)Ferguson, Elizabeth A. Social Work: An Introduction. 2d ed. Lippincott, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.