W. Arninputranto, D. . Maulana, M. D. . Khariansyah, and A. . Maharani, “Implementation of the SERVQUAL Method in Evaluating the Quality of Welding Inspector Comprehensive Training Services at the Shipbuilding Institute of Polytechnic Surabaya”, JCM, vol. 9, no. 2, pp. 21–38, Aug. 2026.