SARI, Malda; SURYA, Edy. Improving the Learning Outcomes of Students using Numbered Heads Together Model in the Subjects of Mathematics. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 33, n. 3, p. 311–319, 2017. Disponível em: https://gssrr.org/JournalOfBasicAndApplied/article/view/7558. Acesso em: 1 oct. 2025.