Rai, U. (2005). Business communication. Himalaya Publishing House.
Lua i Stíl Chicago (17ú heag.)Rai, Urmila. Business Communication. Mumbai: Himalaya Publishing House, 2005.
Lua MLA (9ú heag.)Rai, Urmila. Business Communication. Himalaya Publishing House, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.