Anonymous or Confidentiality in Opinion Survey? (The Selective Aproach for Sampling in Surveys where are Included Delicate Questions). Mediterranean Journal of Social Sciences, [S. l.], v. 4, n. 2, p. 593, 2013. Disponível em: https://www.richtmann.org/journal/index.php/mjss/article/view/243.. Acesso em: 1 sep. 2024.