Cohen, M. N. (1989). Health and the rise of civilization. Yale University Press.
Lua i Stíl Chicago (17ú heag.)Cohen, Mark Nathan. Health and the Rise of Civilization. New Haven: Yale University Press, 1989.
Lua MLA (8ú heag.)Cohen, Mark Nathan. Health and the Rise of Civilization. Yale University Press, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.