Anis Zahro Dwi Lutfiana, et al. “SQL Island for SQL Learning in Indonesian Vocational Education: A Quasi-Experimental Study of Learning Outcomes and Motivation”. Journal of Informatics and Vocational Education, vol. 9, no. 3, Nov. 2026, pp. 58-66, https://doi.org/10.20961/joive.v9i3.3645.