Dyfyniad APA

G Harold. (1985). Erosion: Its causes and cure. International book distributors.

Dyfyniad Arddull Chicago

G Harold. Erosion: Its Causes and Cure. New Delhi: International book distributors, 1985.

Dyfyniad MLA

G Harold. Erosion: Its Causes and Cure. International book distributors, 1985.

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