Singh Bir. (2006). Sales promotion Management. Anmol.
Lua i Stíl Chicago (17ú heag.)Singh Bir. Sales Promotion Management. New Delhi: Anmol, 2006.
Lua MLA (9ú heag.)Singh Bir. Sales Promotion Management. Anmol, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.