“German and Indonesian Politeness Strategies: A Contrastive Study and Its Pedagogical Implications for German Language Teaching”. Jurnal Onoma: Pendidikan, Bahasa, dan Sastra 12, no. 2 (May 2, 2026): 1342–1353. Accessed May 4, 2026. https://e-journal.my.id/onoma/article/view/8430.