K. M. P. Fiedacan, A. J. B. Fetizanan, E. C. J. Jumantoc, A. C. Mabituin, M. N. Yanson, and R. P. Francisco, “Kindergartens’ Short Attention Span in School: A Case Study”, isc, vol. 6, no. 1, p. 313, Oct. 2018.