Kusno, Hendra Sanjaya, et al. “Edukasi Praktik Pengisian SPT PPh 21 Dan PPh Badan Bagi Siswa SMK Di Kota Balikpapan”. Jurnal Abdimas Mahakam, vol. 5, no. 01, Jan. 2021, pp. 42-51, https://ojs.uwgms.ac.id/index.php/abdimasmahakam/article/view/1105.