Kurniawan MD, Wastuti SNY. The Role of PIK-Adolescent Peer Counselors in the Efficient Use of Smartphones among Students at SMA Negeri 11 Medan. edumaspuljr [Internet]. 2024Mar.30 [cited 2026Apr.6];8(1). Available from: https://jurnal.unimen.cloud/index.php/maspuljr/article/view/7683