Martyniak, Kamil. “Threats Posed by Serious and Organised Crime for the Safety and Security of Tourism in Poland”. Scientific Journal of Bielsko-Biala School of Finance and Law 24, no. 2 (June 30, 2020): 32–36. Accessed April 25, 2024. https://asej.eu/index.php/asej/article/view/420.