Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.