Sunarni, H. Karyono, and W. Gunawan. “The Effect of Concept Map Learning, Problem Solving and Achievement Motivation on Indonesian Learning Outcomes”. Jurnal Mantik, vol. 6, no. 3, Sept. 2022, pp. 2789-97, https://iocscience.org/ejournal/index.php/mantik/article/view/2950.