Sushanty VR, Putra AL. THE DEVELOPMENT OF A PLAYGROUND AS AN EFFORT TO REDUCE THE IMPACT OF SMARTPHONE USE ON CHILD’S MINDSET. CSJI [Internet]. 2021Jun.12 [cited 2024Nov.22];3(1):12-4. Available from: https://ejournal-kertacendekia.id/index.php/csji/article/view/287