H. A. Wicaksono and A. Rochmaniah, “Group Communication Predicts Student Politeness Ethics in Junior High School: Komunikasi Kelompok Memprediksi Etika Kesopanan Siswa di Sekolah Menengah Pertama”, acopen, vol. 10, no. 2, p. 10.21070/acopen.10.2025.12653, Dec. 2025.