Yusuf, A. (1997). Differential Equations. Modern Book Centre.
Cita Chicago (17th ed.)Yusuf, A. Differential Equations. Dhaka: Modern Book Centre, 1997.
Cita MLA (9th ed.)Yusuf, A. Differential Equations. Modern Book Centre, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.