ZARDINI, Adriana Sales; COSTA, José Wilson da. Penfriend: a Project for Writing in English. The ESPecialist, [S. l.], v. 30, n. 1, 2011. Disponível em: https://revistas.pucsp.br/index.php/esp/article/view/6217. Acesso em: 5 dec. 2025.