Prusiński, Tomasz. “From Research on Friendship. Social Competencies and the Quality of Friendship Relations”. Studia Psychologica: Theoria et praxis 17, no. 1 (February 21, 2017): 23–46. Accessed November 21, 2024. https://czasopisma.uksw.edu.pl/index.php/sp/article/view/2206.