Sandryawal, and R. Y. H. Silitonga. “The Influence of Internal and External Factors on Labor Productivity: A Study on the Construction Project of the Manokwari Substations”. Journal of Organizational and Human Resource Development Strategies, vol. 2, no. 03, Oct. 2025, pp. 156-6, doi:10.56741/ohds.v2i03.1254.