Cita APA (7th ed.)

Pennisi, L. L. (1972). Elements of ordinary differential equations. Holt, Rinehart and Winston, Inc.

Cita Chicago (17th ed.)

Pennisi, Louis L. Elements of Ordinary Differential Equations. New York: Holt, Rinehart and Winston, Inc, 1972.

Cita MLA (9th ed.)

Pennisi, Louis L. Elements of Ordinary Differential Equations. Holt, Rinehart and Winston, Inc, 1972.