Szwech, Agata. “Sources and the Meaning of coach’s Competences. Case Studies”. Przegląd Badań Edukacyjnych (Educational Studies Review) 2, no. 17 (January 17, 2014): 99–120. Accessed November 29, 2021. https://apcz.umk.pl/PBE/article/view/PBE.2013.015.