United States. Department of Agriculture & Hayes, J. (1981). Will there be enough food? The Department.
芝加哥风格引文United States. Department of Agriculture 与 Jack Hayes. Will There Be Enough Food? [Washington]: The Department, 1981.
MLA引文United States. Department of Agriculture 与 Jack Hayes. Will There Be Enough Food? The Department, 1981.
警告：这些引文格式不一定是100％准确.