Lumban Gaol, D. and Sianturi, T. M. . . (2021) “The Effect of PKN Lessons in Improving the Students Spirit of Nationalism of the National Awakening in1908 of Eight Grade Students SMP Negeri 4 Siborongborong”, Jurnal Mantik, 5(3), pp. 1781-1783. Available at: https://www.ejournal.iocscience.org/index.php/mantik/article/view/1753 (Accessed: 13June2026).