KÁDEKOVÁ, Z.; KRETTER, A. Advertising and Public Relations Efficiency Measurement and Control. Zeszyty Naukowe SGGW, Polityki Europejskie, Finanse i Marketing, [S. l.], n. 5(54), p. 71–77, 2011. DOI: 10.22630/PEFIM.2011.5.54.6. Disponível em: https://pefim.sggw.edu.pl/article/view/1511. Acesso em: 20 sty. 2025.