Hartanti, R. S. and Astuti, B. (2017) “Analysis of Angklung Sound Intensity as a Acoustic Instrument”, Journal of Natural Sciences and Mathematics Research, 2(1), pp. 122–126. Available at: https://journal.walisongo.ac.id/index.php/JNSMR/article/view/1646 (Accessed: 7 June 2025).