Gupta, P. (1996). Calculus of finite differences and numerical analysis (22nd.). Krishna.
Lua i Stíl Chicago (17ú heag.)Gupta, P. Calculus of Finite Differences and Numerical Analysis. 22nd. Meerut: Krishna, 1996.
Lua MLA (9ú heag.)Gupta, P. Calculus of Finite Differences and Numerical Analysis. 22nd. Krishna, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.