APA (7 ম সংস্করণ) উদ্ধৃতি

(1988). Vitamin A supplemnsts Aguide to their use in the treatment and prevention of vitamin A deficiency and xerophthalmia. World health organization.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Vitamin A Supplemnsts Aguide to Their Use in the Treatment and Prevention of Vitamin A Deficiency and Xerophthalmia. Ginebra: World health organization, 1988.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Vitamin A Supplemnsts Aguide to Their Use in the Treatment and Prevention of Vitamin A Deficiency and Xerophthalmia. World health organization, 1988.