APA-referens (7:e uppl.)

Hartree, D. R. (1958). Numerical analysis (2nd.). Oxford University press.

Chicago-referens (17:e uppl.)

Hartree, Douglas R. Numerical Analysis. 2nd. Great Britain: Oxford University press, 1958.

MLA-referens (9:e uppl.)

Hartree, Douglas R. Numerical Analysis. 2nd. Oxford University press, 1958.