Gaya APA

Celia, M, A., Gray, W. (1992). Numerical methods for differential equations : fundamental concepts for scientific and engineering applications . Englewood Cliffs: Prentice-Hall International.

Gaya MLA

Celia, Michael, A.., Gray, William. "Numerical methods for differential equations : fundamental concepts for scientific and engineering applications". Englewood Cliffs: Prentice-Hall International, 1992. Text.