Syanne Pangemanan, Sumarni H Aly, Muralia Hustim. “Analysis of Customer Satisfaction Levels and Service Quality in the Stevedoring Process at Container Terminals (Case Study at Surabaya, Makassar and Bitung Container Terminals)”. Design Engineering, no. 1, Mar. 2023, pp. 213 -23, http://thedesignengineering.com/index.php/DE/article/view/9778.