Determinants of Business Productivity in the Tourism Sector of Magelang Regency. Efficient: Indonesian Journal of Development Economics, [S. l.], v. 9, n. 2, p. 219–230, 2026. DOI: 10.15294/efficient.v9i2.40629. Disponível em: https://journal.unnes.ac.id/journals/efficient/article/view/40629. Acesso em: 11 sep. 2026.