Boole, G. (1958). Calculus of finite differences(1958) (4th ed.). Chelsea Publishing.
Lua i Stíl Chicago (17ú heag.)Boole, George. Calculus of Finite Differences(1958). 4th ed. New York: Chelsea Publishing, 1958.
Lua MLA (9ú heag.)Boole, George. Calculus of Finite Differences(1958). 4th ed. Chelsea Publishing, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.