CHROBAK, Stanisław. Joy of Life as an Important Quality of a Teacher-Tutor from a Perspective of John Bosco’s Preventive System. Paedagogia Christiana. Online. 12 June 2015. Vol. 34, no. 2, pp. 121-136. [Accessed 18 July 2024]. DOI 10.12775/PCh.2014.026.