Gumola, Małgorzata. “The Concept of the Effectiveness and Efficiency of Supply Management: A Theoretical Framework and Empirical Application”. Zeszyty Naukowe. Organizacja i Zarządzanie 67, no. 1214 (December 31, 2017): 35-51. Accessed May 19, 2024. https://eczasopisma.p.lodz.pl/OIZ/article/view/382.