Yansen, A., Y. Supriyati, and K. . “The Influence of Employee Promotion, Upward Downward Communication and Work Environment on Job Satisfaction of PT. Holcim Indonesia, Tbk ”. KnE Social Sciences, Vol. 3, no. 26, Oct. 2019, pp. 243–257, doi:10.18502/kss.v3i26.5378.