GUPPY, Neil. Debates and Directions in the Future of Opinion Polling Data. IASSIST Quarterly, [S. l.], v. 11, n. 2, p. 3, 1987. DOI: 10.29173/iq676. Disponível em: https://iassistquarterly.com/index.php/iassist/article/view/676. Acesso em: 3 jul. 2024.