United States. Department of Agriculture & Hayes, J. (1981). Will there be enough food? The Department.
Chicago-referens (17:e uppl.)United States. Department of Agriculture och Jack Hayes. Will There Be Enough Food? [Washington]: The Department, 1981.
MLA-referens (9:e uppl.)United States. Department of Agriculture och Jack Hayes. Will There Be Enough Food? The Department, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.