KRITZINGER, W. H. C. The business letter. English Usage in Southern Africa, [S. l.], v. 10, n. 1–2, p. 34–39, 2018. Disponível em: https://www.unisapressjournals.co.za/index.php/EUSA/article/view/5413. Acesso em: 19 oct. 2025.