Diem, P. T. H., Thuy, B. T., Anh, D. Q., & Quan, T. M. (2025). Golden Posture – Bright Eyes Flashcard Set: Guiding Proper Sitting Posture and Protecting Vision for Secondary School Students . RA Journal of Applied Research, 11(11), 988–993. https://doi.org/10.47191/rajar/v11i11.04