Maulana A. Analisis Validtas, Reliabilitas, dan Kelayakan Instrumen Penilaian Rasa Percaya Diri Siswa. jkp [Internet]. 2022Dec.30 [cited 2026Feb.10];3(3):133-9. Available from: https://journal.kualitama.com/index.php/jkp/article/view/331