APPLICATION OF PREPARATORY CENTER ACTIVITIES IN COGNITIVE GROUP B CHILDREN IN RA SALAFIYAH SYAFI’IYAH KLINTEREJO. pr [Internet]. 2022 Oct. 1 [cited 2026 Sep. 17];6(1):513-21. Available from: https://jurnal.stitnualhikmah.ac.id/index.php/proceedings/article/view/1373