Sommer, A. (1995). Vitamin A deficiency and its consequences: A field guide to detection and control (3rd ed.). World Health Organization.
Citação norma ChicagoSommer, Alfred. Vitamin A Deficiency and Its Consequences: A Field Guide to Detection and Control. 3rd ed. Geneva: World Health Organization, 1995.
Citação norma MLASommer, Alfred. Vitamin A Deficiency and Its Consequences: A Field Guide to Detection and Control. 3rd ed. World Health Organization, 1995.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.