APA Style

Organization, W, H. (1997). Vitamin A Supplements : A Guide to their Use in the Treatment and Prevention of Vitamin A Deficiency and Xerophthalmia (2nd ed.). Geneva: World Health Organization.

MLA Style

Organization, World, Health. "Vitamin A Supplements : A Guide to their Use in the Treatment and Prevention of Vitamin A Deficiency and Xerophthalmia". 2nd ed. Geneva: World Health Organization, 1997. print.