Cita APA (7a ed.)

Chow, S., Li, C., & Wang, D. (1994). Normal forms and bifurcation of planar vector fields. University Press.

Cita Chicago Style (17a ed.)

Chow, Shui-Nee, Chengzhi Li, y Duo Wang. Normal Forms and Bifurcation of Planar Vector Fields. Cambridge: University Press, 1994.

Cita MLA (9a ed.)

Chow, Shui-Nee, et al. Normal Forms and Bifurcation of Planar Vector Fields. University Press, 1994.