Wote, A. Y. V. ., M. Sasingan, and M. M. P. N. . Kusumawati. “Correlation of Breakfast With Learning Concentration in Fourth Grade Elementary School”. Journal of Psychology and Instruction, vol. 6, no. 3, Jan. 2023, pp. 122-7, doi:10.23887/jpai.v6i3.52275.