Cita APA (7th ed.)

Lefschetz, S. (1977). Differential equations: Geometric theory (2a. ed.). Dover Publications Inc.

Cita Chicago (17th ed.)

Lefschetz, Solomon. Differential Equations: Geometric Theory. 2a. ed. Nueva York: Dover Publications Inc, 1977.

Cita MLA (9th ed.)

Lefschetz, Solomon. Differential Equations: Geometric Theory. 2a. ed. Dover Publications Inc, 1977.