Purnama, Raden Natanegara Kartika, et al. “Policy for Increasing PNBP in Public Services in the Immigration Sector”. Jurnal Ilmiah Kebijakan Hukum, vol. 17, no. 1, Mar. 2023, pp. 69-80, doi:10.30641/kebijakan.2023.V17.69-80.