Tiwari, R. (2006). Business Communication. Pointer.
Lua i Stíl Chicago (17ú heag.)Tiwari, Ramesh. Business Communication. Jaipur: Pointer, 2006.
Lua MLA (9ú heag.)Tiwari, Ramesh. Business Communication. Pointer, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.