ANDERSON, John A. The Purple Cow: Marketing and Axiology. Journal of Formal Axiology: Theory and Practice, [S. l.], v. 4, p. 175–184, 2011. DOI: 10.67945/jfa.v4i.96. Disponível em: https://journal.hartmaninstitute.org/index.php/jfa/article/view/96. Acesso em: 13 nov. 2026.