Alwiyah Sylvia Smith; Norma Octaviani; Siti Silpi Salpiah; Yasika Irawati. Analysis of Guidebook: Belajar Dan Bermain For Preschool Children In Merdeka Curriculum Using Vygotsky’s Zone Of Proximal Development (Zpd) Theory. MJSIS 2024, 1, 158-165.