Paladang, Karmila Kristina, et al. “ANALISIS KESALAHAN SISWA KELAS VIII SLH MEDAN DALAM MENGERJAKAN SOAL MATEMATIKA MATERI FUNGSI DITINJAU DARI PROSEDUR NEWMAN [ANALYZING STUDENTS’ ERRORS IN SOLVING MATHEMATICS PROBLEMS IN FUNCTION TOPICS BASED ON NEWMAN’S PROCEDURES IN GRADE 8 AT SLH MEDAN]”. JOHME: Journal of Holistic Mathematics Education, vol. 1, no. 2, May 2018, pp. 93-103, doi:10.19166/johme.v1i2.798.