Bida, Olena, and Lyudmyla Prokopenko. “Korczak Janusz, Makarenko Anton, Zaharenko Olexandr – Knights of Humane Pedagogy”. Journal of Vasyl Stefanyk Precarpathian National University 1, no. 2-3 (December 22, 2014): 263–266. Accessed May 18, 2024. https://scijournals.pnu.edu.ua/index.php/jpnu/article/view/2209.