Utomo, Joko Budi, et al. “Enhancing GTAW Proficiency through ADDIE-Integrated Joyful Lear-Ning Simulation: Empirical Insights from Vocational High School Implementation”. Journal of Deep Learning, vol. 1, no. 2, Sept. 2025, pp. 169-78, doi:10.23917/jdl.v1i2.11661.