Rospita, Elvi, 		Wutun, Antonius, AND 		Ardiningtyas, Sri.
" THE USE OF SIX SIGMA TECHNIQUE TO IMPROVE STUDENTS' WRITING SKILL AT THE SECOND GRADE OF SMP KRISTEN KONDOSAPATA" <em>Journal English Education</em> [Online], Volume 3 Number 1 (15 July 2022)