AITMUKHAMETOVA, K.O. Culture of official and business communication of a civil servant. Public Administration and Civil Service, Нур-Султан, Казахстан, n. 4, p. 84–87, 2013. Disponível em: https://journal.apa.kz/index.php/path/article/view/692. Acesso em: 11 jan. 2026.