Rai, U. (1991). Business Communication. Himalaya Publishing House.
Lua i Stíl Chicago (17ú heag.)Rai, U. Business Communication. Mumbai: Himalaya Publishing House, 1991.
Lua MLA (9ú heag.)Rai, U. Business Communication. Himalaya Publishing House, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.