Keith, J. (1982). Old people as people: Social and cultural influences on againg and old age. Little, Brown.
Lua i Stíl Chicago (17ú heag.)Keith, Jennie. Old People as People: Social and Cultural Influences on Againg and Old Age. Little, Brown, 1982.
Lua MLA (9ú heag.)Keith, Jennie. Old People as People: Social and Cultural Influences on Againg and Old Age. Little, Brown, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.