Lestari, Wini Widia, et al. “Productive Workforce: Portrait, Role and Strategy in Bogor Regency”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 55, no. 1, Jan. 2021, pp. 235-46, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/12209.