Agency for International Development y The Nutrition Foundation. (1988). Guidelines For The Eradication Of Vitamin A Deficiency And Xerophthalmia (Tercera edición.). Agency for International Development.
Citace podle Chicago (17th ed.)Agency for International Development y The Nutrition Foundation. Guidelines For The Eradication Of Vitamin A Deficiency And Xerophthalmia. Tercera edición. Washington: Agency for International Development, 1988.
Citace podle MLA (8th ed.)Agency for International Development y The Nutrition Foundation. Guidelines For The Eradication Of Vitamin A Deficiency And Xerophthalmia. Tercera edición. Agency for International Development, 1988.
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