Sommer, A. (1996). Vitamin A deficiency: Health, survival, and vision. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Sommer, Alfred. Vitamin A Deficiency: Health, Survival, and Vision. New York: Oxford University Press, 1996.
Lua MLA (8ú heag.)Sommer, Alfred. Vitamin A Deficiency: Health, Survival, and Vision. Oxford University Press, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.