Boole, G. (1958). Calculus of finite differences(1958) (4th ed.). Chelsea Publishing.
Chicago-viite (17. p.)Boole, George. Calculus of Finite Differences(1958). 4th ed. New York: Chelsea Publishing, 1958.
MLA-viite (9. p.)Boole, George. Calculus of Finite Differences(1958). 4th ed. Chelsea Publishing, 1958.
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