KLAAS, Jim. Best Practices in Online Polling. The International Review of Research in Open and Distributed Learning, [S. l.], v. 4, n. 2, 2003. DOI: 10.19173/irrodl.v4i2.137. Disponível em: https://www.irrodl.org/index.php/irrodl/article/view/137. Acesso em: 26 apr. 2024.