APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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