Gupta, S., & Gupta, I. (1992). Practical statistics. Himalaya Pub House.
Lua i Stíl Chicago (17ú heag.)Gupta, S., agus I. Gupta. Practical Statistics. Mumbai: Himalaya Pub House, 1992.
Lua MLA (9ú heag.)Gupta, S., agus I. Gupta. Practical Statistics. Himalaya Pub House, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.