Dyfyniad APA

United States. Bureau of Reclamation. (1981). Reclamation era. Bureau of Reclamation ; For sale by the Supt. of Docs., U.S. G.P.O..

Dyfyniad Arddull Chicago

United States. Bureau of Reclamation. Reclamation Era. Denver, Colo. : Washington, D.C.: Bureau of Reclamation ; For sale by the Supt. of Docs., U.S. G.P.O., 1981.

Dyfyniad MLA

United States. Bureau of Reclamation. Reclamation Era. Bureau of Reclamation ; For sale by the Supt. of Docs., U.S. G.P.O., 1981.

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