A Study on the Evolution of Crowdsourcing Websites. European Journal of Social Science Education and Research, [S. l.], v. 5, n. 3, p. 01–18, 2018. DOI: 10.26417/ejser.v11i1.p29-40. Disponível em: https://revistia.com/index.php/ejser/article/view/6512.. Acesso em: 2 may. 2024.