Azizi, M. N. and Siswanto, A. (2025) “Implementation of calculation and deduction of income tax article 23 on train washing contracting and on trip cleaning PT. KAI DAOP 9 Jember in the perspective of Islamic economics”., Journal of Commerce, Management, and Tourism Studies. Indonesia, 4(3), pp. 512–520. doi: 10.58881/jcmts.v4i3.403.