THE ORIGINS OF HANYU PINYIN AND MANDARIN TONES: PEDAGOGICAL STRATEGIES FOR EFFECTIVE ACQUISITION. Eureka Journal of Education & Learning Technologies, [S. l.], v. 2, n. 4, p. 247–255, 2026. Disponível em: https://eurekaoa.com/index.php/2/article/view/873. Acesso em: 6 may. 2026.