Cita APA (7th ed.)
Perko, L. (2001). Differential equations and dynamical systems (3rd ed.). Springer.
Cita Chicago (17th ed.)
Perko, Lawrence. Differential Equations and Dynamical Systems. 3rd ed. New Delhi: Springer, 2001.
Cita MLA (9th ed.)
Perko, Lawrence. Differential Equations and Dynamical Systems. 3rd ed. Springer, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.