Dyfyniad APA

(1915). Yearbook of the United States Department of Agriculture 1915. Government Printing.

Dyfyniad Arddull Chicago

Yearbook of the United States Department of Agriculture 1915. Washington: Government Printing, 1915.

Dyfyniad MLA

Yearbook of the United States Department of Agriculture 1915. Government Printing, 1915.

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