Research on Music Theory in Music Textbooks of PMP. Journal of Global Humanities and Social Sciences, [S. l.], v. 2, n. 1, p. 18–20, 2021. DOI: 10.47852/bonviewGHSS2021020104. Disponível em: http://ojs.bonfuturepress.com/index.php/GHSS/article/view/114. Acesso em: 4 apr. 2025.