Cita APA (7a ed.)

Petrovskii, I. G. (1966). Ordinary differential equations.

Cita Chicago Style (17a ed.)

Petrovskii, Ivan Georgievich. Ordinary Differential Equations. Englewwod Cliffs, New Jersey: Prentice Hall, Inc, 1966.

Cita MLA (9a ed.)

Petrovskii, Ivan Georgievich. Ordinary Differential Equations. 1966.