Rocalina, N., E. Yusmin, D. Ahmad, H. Halini, and A. Hartoyo. “Ability to Interpret Concentration of Statistical Data in the Form of Diagrams in Class VII Students of SMP Negeri 1 Boyan Tanjung”. Jurnal Pendidikan Indonesia, vol. 2, no. 01, Oct. 2023, pp. 46-55, https://jurnal.seaninstitute.or.id/index.php/jupei/article/view/263.