Dyfyniad APA

Barnes, H. H. (1967). Roughness characteristics of natural channels. U.S. Government Printing Office.

Dyfyniad Arddull Chicago

Barnes, Harry H. Roughness Characteristics of Natural Channels. Washington: U.S. Government Printing Office, 1967.

Dyfyniad MLA

Barnes, Harry H. Roughness Characteristics of Natural Channels. U.S. Government Printing Office, 1967.

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