Dyfyniad APA

Gurmel Singh. (1990). mannual of soil and water conseervation Practices. Oxford and IBH publishing.

Dyfyniad Arddull Chicago

Gurmel Singh. Mannual of Soil and Water Conseervation Practices. New Delhi: Oxford and IBH publishing, 1990.

Dyfyniad MLA

Gurmel Singh. Mannual of Soil and Water Conseervation Practices. Oxford and IBH publishing, 1990.

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