Alfianti DM, Tjendani HT, Witjaksana B. Analysis of Improving the Quality of Mass Transportation Services with the Buy the Service (BTS) Scheme Using the Importance Performance Analysis (IPA) Method: Case Study of BTS Route Gresik – Lamongan. JWS [Internet]. 2025Feb.10 [cited 2026Nov.13];4(2):173-85. Available from: https://jws.rivierapublishing.id/index.php/jws/article/view/1284