APA (7th ed.) Citation

Giacaglia, G. E. O. (1972). Perturbation methods in non-linear systems. Springer-Verlag.

Chicago Style (17th ed.) Citation

Giacaglia, G. E. O. Perturbation Methods in Non-linear Systems. Nueva York: Springer-Verlag, 1972.

MLA (9th ed.) Citation

Giacaglia, G. E. O. Perturbation Methods in Non-linear Systems. Springer-Verlag, 1972.