Babl A, Eubanks CF, Goldfried MR. A 21st Century Principle-Based Training Approach to Psychotherapy: A Contribution to the Momentum of Transtheoretical Work. Clin Psychol Eur [Internet]. 2024Apr.26 [cited 2026Jun.18];6:Article e11925. Available from: https://cpe.psychopen.eu/index.php/cpe/article/view/11925