Cita APA (7th ed.)

Shishkin, G. I., & Shishkina, L. P. (2009). Difference methods for singular perturbation problems. CRC Press.

Cita Chicago (17th ed.)

Shishkin, Grigory I., i Lidia P. Shishkina. Difference Methods for Singular Perturbation Problems. Boca Raton, Fla: CRC Press, 2009.

Cita MLA (9th ed.)

Shishkin, Grigory I., i Lidia P. Shishkina. Difference Methods for Singular Perturbation Problems. CRC Press, 2009.