Cox, H. (2000). Aging (13th ed.). Dushkin/McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Cox, Harold. Aging. 13th ed. Guilford, Conn. :: Dushkin/McGraw-Hill, 2000.
Lua MLA (8ú heag.)Cox, Harold. Aging. 13th ed. Dushkin/McGraw-Hill, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.