Nunnagupala, L. S. C. ., S. R. Mallreddy, and J. R. . Padamati. “Achieving PCI Compliance With CRM Systems”. Turkish Journal of Computer and Mathematics Education (TURCOMAT), vol. 13, no. 1, Jan. 2022, pp. 529-35, doi:10.61841/turcomat.v13i1.14689.