Παραπομπή APA

Birkhoff, G., & Rota, G. (1989). Ordinary differential equations (4th ed.). Wiley.

Παραπομπή Chicago Style

Birkhoff, Garrett, και Gian-Carlo Rota. Ordinary Differential Equations. 4th ed. Singapore: Wiley, 1989.

Παραπομπή MLA

Birkhoff, Garrett, και Gian-Carlo Rota. Ordinary Differential Equations. 4th ed. Wiley, 1989.