SARAGIH, Doni Irawan; SURYA, Edy. Analysis the Effectiveness of Mathematics Learning Using Contextual Learning Model. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 34, n. 1, p. 135–143, 2017. Disponível em: https://gssrr.org/JournalOfBasicAndApplied/article/view/7494. Acesso em: 18 sep. 2025.