Dear @Fatmir, why do you prefer ladder logic? There are many new approaches to the PLC programming (FBD, SFC,...). Ladder logic is not suitable for complex systems.
Try this resource Uvod u industrijske PLC kontrolere. Chapter 3 and 4 are relevant for ladder logic.
The third link: Programabilni logički kontroleri - uvod u programiranje i primenu
Please, find attached list of hundreds of books on PLC. Each of them include ladder logic, most of them include modern methods of PLC's programming and standards.
Second link brings you over thousand of articles on PLC programming at Researchgate database.