WHO. (1982). Control G vitamin A defiuincy and xerophthalmia. Geneva.
Chicago Edition CitationWHO. Control G Vitamin A Defiuincy and Xerophthalmia. Geneva, 1982.
MLA引文WHO. Control G Vitamin A Defiuincy and Xerophthalmia. Geneva, 1982.
警告：這些引文格式不一定是100％准確.