M. B. Abdullah, M. A. B. Mohd Daril, M. I. B. Abdul Wahab, K. B. Subari, and S. M. B. Abdullah, “Exploratory Study on the Online Learning Understanding Based on Movement and Condition in Sitting Position”, Int. J. Interact. Mob. Technol., vol. 15, no. 18, pp. pp. 80–89, Sep. 2021.