Madhukar, R. (2005). Business communication. Vikas.
Lua i Stíl Chicago (17ú heag.)Madhukar, R. Business Communication. New Delhi: Vikas, 2005.
Lua MLA (9ú heag.)Madhukar, R. Business Communication. Vikas, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.