“SIMFONI NUSANTARA BOOK AS A LEARNING MEDIA FOR VIOLIN MUSIC IN CHILDREN”. CITRA : International Journal of Community Service, Informatics, Technology, Research in Education, Art and Humanities, vol. 1, no. 1, July 2022, pp. 46-56, https://ejournal.citradharma.org/index.php/citra/article/view/110.