Hancock, B. L. (1987). Social work with older people. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Hancock, Betsy Ledbetter. Social Work with Older People. Englewood Cliffs: Prentice-Hall, 1987.
Lua MLA (9ú heag.)Hancock, Betsy Ledbetter. Social Work with Older People. Prentice-Hall, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.