Rosiak, Karolina, and Michael Hornsby. “Motivational Factors in the Acquisition of Welsh in Poland”. Studia Celtica Posnaniensia 1 (November 23, 2016): 57–73. Accessed May 17, 2026. https://pressto.amu.edu.pl/index.php/scp/article/view/scp-2016-0004.