The Effect of Classical Guidance Services Using the Jigsaw Cooperative Learning Model on Students’ Self-Regulation at SMA Negeri 8 Medan. Cakrawala Sekol. J. Multidiscip. Sch. Educ. [Internet]. 2026 Jun. 19 [cited 2026 Jul. 7];1(2 May):14-20. Available from: https://esp-journal.com/index.php/cakrawala-sekolah/article/view/242