Group Investigation Technique on Indonesian High School Students’ Writing Skill. DOI: http://dx.doi.org/10.31000/globish.v6i2 [Internet]. 31 Januari 2020 [dikutip 12 Agustus 2026];9(1):55-63. Tersedia pada: https://jurnal.umt.ac.id/index.php/globish/article/view/2333