BUCHWALD, Tomasz; 						GUZEWSKI, Tomasz.
 Consumer relationship management systems in an international company.
<strong>Progress in Economic Sciences</strong>, [S.l.], n. 1, aug. 2014.
ISSN 2391-5951.
Available at: &lt;<a href="http://www.pes.pwsz.pila.pl/index.php/PES/article/view/25" target="_new">http://www.pes.pwsz.pila.pl/index.php/PES/article/view/25</a>&gt;. Date accessed: 19 aug. 2025.
doi: <a href="https://doi.org/10.14595/PIES/01/019">https://doi.org/10.14595/PIES/01/019</a>.