S. U. A. I. G. A. K. R. H. Adi Sulistiyono, “ANALYSIS OF TRANSFORMATION AND PROBLEMATIC PROCESSES OF PT ASABRI (PERSERO) AND PT TASPEN (PERSERO) BECOME EMPLOYEES SOCIAL SECURITY SYSTEM”, IJAST, vol. 29, no. 4s, pp. 852 - 856, Mar. 2020.