Norms of Etiquette Communication in Foreign Language Teaching. Philological Studies: Scientific Bulletin of Kryvyi Rih State Pedagogical University, [S. l.], v. 12, p. 255–262, 2015. DOI: 10.31812/filstd.v12i0.343. Disponível em: https://journal.kdpu.edu.ua/filstd/article/view/343. Acesso em: 5 dec. 2025.