BĄK-FILIPEK, E.; TETWEJER, U. Marketing in the food trade. Zeszyty Naukowe SGGW, Polityki Europejskie, Finanse i Marketing, [S. l.], n. 5(54), p. 17–35, 2011. Disponível em: https://pefim.sggw.edu.pl/article/view/1515. Acesso em: 29 sty. 2023.