Asrotinengseh, A., & Sulistyanto, I. (2022). THE IMPLEMENTATION OF COMMUNICATIVE LANGUAGE TEACHING PRINCIPLES IN TEACHING BUSINESS LETTER WRITING AT GENTA ENGLISH COURSE. Jurnal Pendidikan Bahasa Inggris Proficiency, 4(1), 47 - 56. doi:10.32503/proficiency.v4i1.2248