Morris, M. (1952). Differential equations (3rd ed.). Prentice-Hall.
Cita Chicago (17th ed.)Morris, Max. Differential Equations. 3rd ed. Englewood Cliffs N. J: Prentice-Hall, 1952.
Cita MLA (9th ed.)Morris, Max. Differential Equations. 3rd ed. Prentice-Hall, 1952.
Atenció: Aquestes cites poden no estar 100% correctes.