Dyfyniad APA

(1955). The yearbook of agriculture 1955 - Water. Washington: U.S.Department of Agriculture.

Dyfyniad Arddull Chicago

The Yearbook of Agriculture 1955 - Water. Washington: U.S.Department of Agriculture, 1955.

Dyfyniad MLA

The Yearbook of Agriculture 1955 - Water. Washington: U.S.Department of Agriculture, 1955.

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