Thomas, William J., Alexander O. Hauson, Jessica E. Lambert, Mark J. Stern, Julia M. Gamboa, Kenneth E. Allen, Rick A. Stephan, et al. “A Meta-Analysis of the Effectiveness of Cognitive-Behavioural Therapies for Late-Life Depression”. Canadian Journal of Counselling and Psychotherapy 52, no. 1 (January 10, 2018). Accessed December 5, 2025. https://cjc-rcc.ucalgary.ca/article/view/61167.