Darma, I.K., Candiasa, I.M., Sadia, I.W. and 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 (Jul. 2018), 7–16. DOI:https://doi.org/10.21744/irjeis.v4n4.254.