Cita APA (7th ed.)

United States. Department of Agriculture & Hayes, J. (1981). Will there be enough food? The Department.

Cita Chicago (17th ed.)

United States. Department of Agriculture i Jack Hayes. Will There Be Enough Food? [Washington]: The Department, 1981.

Cita MLA (9th ed.)

United States. Department of Agriculture i Jack Hayes. Will There Be Enough Food? The Department, 1981.

Atenció: Aquestes cites poden no estar 100% correctes.