Não informado. (1956). Social Work. National Association of Social Workers.
Lua i Stíl Chicago (17ú heag.)Não informado. Social Work. Silver Spring, Md: National Association of Social Workers, 1956.
Lua MLA (8ú heag.)Não informado. Social Work. National Association of Social Workers, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.