Hi Gufran! There is no correct number of references; however, I do recommend that you review the guidance for authors specific to the journal to which you will be submitting. Best of luck!
i agree with Kyle and Dinesh. The number of references depends upon your target journal and is mentioned in the journal's 'instructions to authors' section in print as well as online. It is usually between 20-25. In review articles it is around 35-40.