APA-viite

Perko, L. (1991). Differential equations and dynamical systems. Springer-Verlag.

Chicago-tyylinen lähdeviittaus

Perko, Lawrence. Differential Equations and Dynamical Systems. New York: Springer-Verlag, 1991.

MLA-viite

Perko, Lawrence. Differential Equations and Dynamical Systems. Springer-Verlag, 1991.