Khoririn, Dwiqi Ibnu, and Chivalrind Ghanevi Ayuntari. “Optimalisasi Perencanaan Pajak PPh Pasal 21: Analisis Komparatif Metode Gross, Net, Gross-Up, Dan Mixed Berdasarkan PMK 168/2023 Pada PT PN”. Surplus: Jurnal Ekonomi dan Bisnis 4, no. 1 (August 19, 2025): 72–82. Accessed February 10, 2026. https://yptb.org/index.php/sur/article/view/1431.