PIECHOTA, Grażyna. Managing of communication processes in social media by the cities of Metropolitan Association of Upper Silesia and their majors. Journal of Public Governance, Poland, v. 22, n. 4, p. 52–67, 2013. Disponível em: https://publicgovernance.pl/zpub/article/view/247.. Acesso em: 24 nov. 2024.