Colón, Luz N., Francisco S. Guzmán-Yunqué, and Luz M. Guevara-Ramos. “Early Detection of Depression Using the Zung Self-Rating Depression Scale”. Puerto Rico Health Sciences Journal 16, no. 4 (October 3, 2019). Accessed December 20, 2025. https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/1731.