Indriana, I., P. Pathuddin, R. Lefrida, and A. Alfisyahra. “Newman’s Error Analysis: The Students’ Errors in Solving Word Problems of Proportion”. Edumatika : Jurnal Riset Pendidikan Matematika, vol. 7, no. 1, May 2024, doi:10.32939/ejrpm.v7i1.3642.