Hastuti D, Hardiani H. The effect of project based learning (PJBL) on student economics and business mathematics learning outcomes: analysis on the topic of taxes and subsidies. jpe [Internet]. 2024 Jul. 11 [cited 2025 May 20];19(2):248-59. Available from: https://mail.online-journal.unja.ac.id/paradigma/article/view/36001