Siregar, M. U., and D. E. K. Mahardika. “An Implementation of Web-Based Payroll Information System in Universitas Proklamasi 45 Yogyakarta”. IJID (International Journal on Informatics for Development), vol. 7, no. 2, Jan. 2019, pp. 48-53, doi:10.14421/ijid.2018.07201.