W. Purwanto, H. Saputra, D. Putra, Z. Abadi, A. Arif, and I. Kustanrika, “Improving Student Achievement with the Application of Smart Trainers Integrated QR Code”, AEEJ : Journal of Automotive Engineering and Vocational Education, vol. 6, no. 2, pp. 73-80, Sep. 2025.