Marinus Ndruru (2023) “Efforts to improve mathematics learning outcomes through the project based learning model for class x students of smk negeri 1 hilimegai”, Journal of Education Innovation and Curriculum Development, 1(3), pp. 61–65. Available at: https://journals.iarn.or.id/index.php/educur/article/view/236 (Accessed: 20 April 2026).