APA
WHO TRS 590, . (1976). Vitamin A deficiency and xerophthalmia. : .
Chicago
WHO TRS 590, . 1976. Vitamin A deficiency and xerophthalmia. : .
Harvard
WHO TRS 590, . (1976). Vitamin A deficiency and xerophthalmia. : .
MLA
WHO TRS 590, . Vitamin A deficiency and xerophthalmia. : . 1976.