Sommer, A. (1996). Vitamin A deficiency: Health, survival, and vision. Oxford University Press.
Dyfyniad Arddull ChicagoSommer, Alfred. Vitamin A Deficiency: Health, Survival, and Vision. New York: Oxford University Press, 1996.
Dyfyniad MLASommer, Alfred. Vitamin A Deficiency: Health, Survival, and Vision. Oxford University Press, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.