KAŹMIERCZAK, Justyna; ŁABUZ, Artur. Multi-level marketing. Features and controversy. Annals of Marketing Management & Economics, [S. l.], v. 4, n. 1, p. 25–34, 2018. DOI: 10.22630/AMME.2018.4.1.2. Disponível em: https://amme.sggw.edu.pl/article/view/6897. Acesso em: 19 apr. 2025.