Pertiwi, Shanti Asih, et al. “The Relationship Between Work Shifts and Changes in Vital Signs of Health Workers: A Quantitative Study in Amalia Medika Pelalawan Riau Hospital”. Journal of Economics and Social Sciences (JESS), vol. 4, no. 2, Dec. 2025, pp. 1637-52, doi:10.59525/jess.v4i2.1172.