APA
WHO T. n. 6., .Conyrol of Vitamin A deficiency and xerophthionl. : .
Chicago
WHO TRS na 672, .Conyrol of Vitamin A deficiency and xerophthionl. : .
Harvard
WHO T. n. 6., .Conyrol of Vitamin A deficiency and xerophthionl. : .
MLA
WHO TRS na 672, .: . .