SKĄPSKA, E.; ROLLNIK-SADOWSKA, E.; KONICKA, E. Methods of Increasing Labour Productivity in Service Enterprise. Olsztyn Economic Journal, [S. l.], v. 12, n. 4, p. 387–399, 2017. DOI: 10.31648/oej.2838. Disponível em: https://czasopisma.uwm.edu.pl/index.php/oej/article/view/2838. Acesso em: 24 apr. 2024.