N. R. Hidayah, K. C. Susena, and S. P. Alpino, “Application of Income Tax Calculation (PPH) Article 21 Permanent Employees at PT. Bumi Mitra Buton Abadi”, J. Ekon. Islam Akunt. Manaj., vol. 1, no. 2, pp. 43–48, Feb. 2025.