Rajagukguk, J. R., and B. A. Wibowo. “Study of Customer Satisfaction Index on The Reliability of Motor Services Using the ServQual Method In The Educational Environment : Case Study At Stap One Workshop”. Proceedings of The International Halal Science and Technology Conference, vol. 15, no. 1, Dec. 2022, pp. 232-44, doi:10.31098/ihsatec.v15i1.615.