Hoepers, C., Barbosa, H. F., Steding-Jessen, K., & CGI.br. (2017). Fighting Internet spam in Brazil - Historical overview and reflections on combating spam and managing port 25, coordinated by the Brazilian Internet Steering Committee. Comitê Gestor da Internet no Brasil.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hoepers, Cristine, Henrique Faulhaber Barbosa, Klaus Steding-Jessen, و CGI.br. Fighting Internet Spam in Brazil - Historical Overview and Reflections on Combating Spam and Managing Port 25, Coordinated by the Brazilian Internet Steering Committee. Comitê Gestor da Internet no Brasil, 2017.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Hoepers, Cristine, et al. Fighting Internet Spam in Brazil - Historical Overview and Reflections on Combating Spam and Managing Port 25, Coordinated by the Brazilian Internet Steering Committee. Comitê Gestor da Internet no Brasil, 2017.