Cita APA (7th ed.)
Nagle, R., & Saff, E. (2000). Fundamentals of diffential equations (5th.ed.). Addison-Wesley.
Cita Chicago (17th ed.)
Nagle, R.Kent, i E.B,.1944- Saff. Fundamentals of Diffential Equations. 5th.ed. Massachusetts: Addison-Wesley, 2000.
Cita MLA (9th ed.)
Nagle, R.Kent, i E.B,.1944- Saff. Fundamentals of Diffential Equations. 5th.ed. Addison-Wesley, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.