Keith, J. (1982). Old people as people: Social and cultural influences on againg and old age. Little, Brown.
Citazione stile Chigago Style (17a edizione)Keith, Jennie. Old People as People: Social and Cultural Influences on Againg and Old Age. Little, Brown, 1982.
Citatione MLA (9a ed.)Keith, Jennie. Old People as People: Social and Cultural Influences on Againg and Old Age. Little, Brown, 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.