United States Department of Agriculture. (1956). Water: The yearbook of agriculture 1955. The United States Government Printing Office.
Citazione stile Chigago Style (17a edizione)United States Department of Agriculture. Water: The Yearbook of Agriculture 1955. Washington, D.C: The United States Government Printing Office, 1956.
Citatione MLA (9a ed.)United States Department of Agriculture. Water: The Yearbook of Agriculture 1955. The United States Government Printing Office, 1956.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.