Utami (2026) “Workforce Mental Health Dynamics in the Formal Sector: A Correlative Study of Regional Minimum Wage (UMR) and the Happiness Index on National Productivity”, Public Research on Outreach, Motivation, and Knowledge for Education in Society (PROMKES), 1(1), pp. 10–18. Available at: https://gpijournal.com/index.php/promkes/article/view/454 (Accessed: 11 June 2026).