WILLOUGHBY, Todd; PERRY, Garry P. Working With Violent Youth: Application of the Transtheoretical Model of Change. Canadian Journal of Counselling and Psychotherapy, [S. l.], v. 36, n. 4, 2007. Disponível em: https://journalhosting.ucalgary.ca/index.php/rcc/article/view/58702. Acesso em: 10 jan. 2026.