1-1- Differential Equations for Engineers, Wei-Chau Xie, University of Waterloo, Ontario, Cambridge University Press, Online ISBN:9780511761683, 2010.
2- Differential Equations for Engineers: The Essentials 1st Edition, David V. Kalbaugh, ISBN-10, 1498798810, CRC Press, 2017.
3- Boyce's Elementary Differential Equations and Boundary Value Problems, William E. Boyce,Richard C. DiPrima,Douglas B. Meade, ISBN10 : 1119382874, John Wiley & Sons Inc, 2017.