Darma, I. K., Candiasa, I. M., Sadia, I. W., & Dantes, N. (2018). Problem-based learning and authentic assessment on conceptual understanding and ability to solve mathematical problems: Among students of Politeknik Negeri Bali. International Research Journal of Engineering, IT and Scientific Research, 4(4), 7–16. https://doi.org/10.21744/irjeis.v4n4.254