PURBA, R. .; BUTAR-BUTAR, L. E. Improving Students’ Achievement on Writing Procedure Text by Using Group Investigation Strategy at SMK Sandhy Putra Medan. Journal of Maritime and Education (JME), [S. l.], v. 2, n. 1, p. 99-102, 2020. Disponível em: https://ejournal-poltekamimedan.my.id/index.php/jme/article/view/20. Acesso em: 28 oct. 2026.