Bednarczyk, Ewelina, Izabella Marciszek, and Agata Marcysiak. “Seminar "Instruments to Increase Business efficiency””. Management and Administration Journal 31, no. 104 (January 11, 2023): 259–260. Accessed November 20, 2024. https://czasopisma.uws.edu.pl/znadministracja/article/view/3191.