Hay, Julie. “Psychological Boundaries and Psychological Bridges: A Categorisation and the Application of Transactional Analysis Concepts”. International Journal of Transactional Analysis Research & Practice 9, no. 1 (June 20, 2018): 52–81. Accessed November 21, 2024. https://ijtarp.org/article/view/IJTARP-V9I1P52-81.