Wulandari, Monica, Farid Ahmadi, and Djuniadi Djuniadi. “Instrument Of Singing Performance Assesment With The Android Based Inventor App”. Jurnal Seni Musik 9, no. 2 (December 30, 2020): 95-98. Accessed April 27, 2024. http://journal.unnes.ac.id/sju/jsm/article/view/40592.