Lestari, D., M. Andani, T. P. Sari, D. Sylvianica, and S. Sulastri. “Philosophy Education in Learning at School: Systematic Literature Review”. PPSDP International Journal of Education, vol. 4, no. 2, Dec. 2025, pp. 1200-18, doi:10.59175/pijed.v4i2.753.