1.
Lumban Gaol D, Sianturi TM. 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. Mantik [Internet]. 2021Nov.2 [cited 2026May2];5(3):1781-3. Available from: https://iocscience.org/ejournal/index.php/mantik/article/view/1753