APA
Helen Keller International, Darnton-Hill I., . (1989). Vitamin A deficiency in Bangladesh : prevention and control. Dhaka: Helen Keller International.
Chicago
Helen Keller International, Darnton-Hill Ian, . 1989. Vitamin A deficiency in Bangladesh : prevention and control. Dhaka: Helen Keller International.
Harvard
Helen Keller International, Darnton-Hill I., . (1989). Vitamin A deficiency in Bangladesh : prevention and control. Dhaka: Helen Keller International.
MLA
Helen Keller International, Darnton-Hill Ian, . Vitamin A deficiency in Bangladesh : prevention and control. Dhaka: Helen Keller International. 1989.