Buti Sarma Sitompul, Fizri Aspika Putri Pane, M. Dzaky Labib, Nur Adila, Sabilla Meliani Brutu dan Eka Yusnaldi (2025) “21st Century Education: Improving Students’ Skills Using Cooperative Learning Models In Social Studies Learning”, Jurnal Multidisiplin Sahombu, 5(02), hlm. 239–245. Tersedia pada: https://ejournal.seaninstitute.or.id/index.php/JMS/article/view/6229 (Diakses: 7 November 2026).