POLIAK, M. MARKETING V HROMADNEJ OSOBNEJ DOPRAVE. Perner’s Contacts, [S. l.], v. 6, n. 3, p. 320–325, 2011. Disponível em: https://pernerscontacts.upce.cz/index.php/perner/article/view/877. Acesso em: 29 dub. 2024.