Dyfyniad APA

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.

Dyfyniad Arddull Chicago

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.

Dyfyniad MLA

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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