Sugiono, N., elisa kusrini, J. Ali, and S. Miranda. “The Effect of Employee, Management, Working Environment, and Safety Culture on Occupational Healthy and Safety Performance: A Case Study in an Oil and Gas Company in Indonesia”. International Journal of Integrated Engineering, vol. 12, no. 7, Dec. 2020, pp. 268-79, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/3755.