PERLMUTTER, M., & HALL, E. (1985). Adult development and aging. John Wiley and Sons.
Lua i Stíl Chicago (17ú heag.)PERLMUTTER, Marion, agus Elizabeth HALL. Adult Development and Aging. New York: John Wiley and Sons, 1985.
Lua MLA (9ú heag.)PERLMUTTER, Marion, agus Elizabeth HALL. Adult Development and Aging. John Wiley and Sons, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.