United States. Department of Agriculture. (1948). Grass: The yearbook of agriculture 1948. U.S. Government Printing.
Lua i Stíl Chicago (17ú heag.)United States. Department of Agriculture. Grass: The Yearbook of Agriculture 1948. Washington, D.C.: U.S. Government Printing, 1948.
Lua MLA (9ú heag.)United States. Department of Agriculture. Grass: The Yearbook of Agriculture 1948. U.S. Government Printing, 1948.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.