Hajduk-Kasprowicz, Ewa, and Lech Nieżurawski. “Relationship Ending in the Concept of Customer Relationship Management”. Olsztyn Economic Journal 10, no. 2 (June 30, 2015): 103–113. Accessed November 23, 2024. https://czasopisma.uwm.edu.pl/index.php/oej/article/view/3138.