Hartree, D. R. (1958). Numerical analysis (2nd.). Oxford University press.
Lua i Stíl Chicago (17ú heag.)Hartree, Douglas R. Numerical Analysis. 2nd. Great Britain: Oxford University press, 1958.
Lua MLA (9ú heag.)Hartree, Douglas R. Numerical Analysis. 2nd. Oxford University press, 1958.
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