Chivian, E. (1993). Critical condition: Human health and the environment. MIT.
Lua i Stíl Chicago (17ú heag.)Chivian, Eric. Critical Condition: Human Health and the Environment. Cambridge: MIT, 1993.
Lua MLA (9ú heag.)Chivian, Eric. Critical Condition: Human Health and the Environment. MIT, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.