Citazione Stile APA (7a Edizione)

United States. Department of Agriculture. (1948). Grass: The yearbook of agriculture 1948. U.S. Government Printing.

Citazione stile Chigago Style (17a edizione)

United States. Department of Agriculture. Grass: The Yearbook of Agriculture 1948. Washington, D.C.: U.S. Government Printing, 1948.

Citatione MLA (9a ed.)

United States. Department of Agriculture. Grass: The Yearbook of Agriculture 1948. U.S. Government Printing, 1948.