Arking, R. (1998). Biology of aging: Observations and principles. Sinauer Associates.
Lua i Stíl Chicago (17ú heag.)Arking, Robert. Biology of Aging: Observations and Principles. Sinauer Associates, 1998.
Lua MLA (8ú heag.)Arking, Robert. Biology of Aging: Observations and Principles. Sinauer Associates, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.