Silooy JEC. PENINGKATAN KEPERCAYAAN DIRI SISWA KELAS X DPIB 3 SMK NEGERI 4 SEMARANG MELALUI BIMBINGAN KLASIKAL METODE PROBLEM-BASED LEARNING. psnppg [Internet]. 2023 Nov. 30 [cited 2025 Dec. 6];1(2):909-15. Available from: https://conference.upgris.ac.id/index.php/psnppg/article/view/5199