Dyfyniad APA
Perko, L. (2001). Differential equations and dynamical systems (3rd ed.). Springer.
Dyfyniad Arddull Chicago
Perko, Lawrence. Differential Equations and Dynamical Systems. 3rd ed. New Delhi: Springer, 2001.
Dyfyniad MLA
Perko, Lawrence. Differential Equations and Dynamical Systems. 3rd ed. Springer, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.