United States. Department of Agriculture. (1972). Landscape for living. U. S. Govt. Print. Off.
Citazione stile Chigago Style (17a edizione)United States. Department of Agriculture. Landscape for Living. Washington: U. S. Govt. Print. Off, 1972.
Citatione MLA (9a ed.)United States. Department of Agriculture. Landscape for Living. U. S. Govt. Print. Off, 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.