Sitorus CH, Purba M. Faktor yang Mempengaruhi Mood Belajar Piano Siswa Christina Music Course Tarutung. j. mebang [Internet]. 2024 Oct. 30 [cited 2024 Nov. 7];4(2):85-92. Available from: https://jurnal.fib-unmul.id/mebang/article/view/134