Cita APA

U.S.Department of Agriculture. (1948). Grass: The yearbook of agriculture 1946. Washington: U.S.Department of Agriculture.

Citación estilo Chicago

U.S.Department of Agriculture. Grass: The Yearbook of Agriculture 1946. Washington: U.S.Department of Agriculture, 1948.

Cita MLA

U.S.Department of Agriculture. Grass: The Yearbook of Agriculture 1946. Washington: U.S.Department of Agriculture, 1948.