Gupta, S. (2005). Business statstics. Himalaya Publishing House.
Lua i Stíl Chicago (17ú heag.)Gupta, S. Business Statstics. Mumbai: Himalaya Publishing House, 2005.
Lua MLA (9ú heag.)Gupta, S. Business Statstics. Himalaya Publishing House, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.