Fernandes, Luis, et al. “HAMBATAN BELAJAR MATEMATIKA: STUDI KASUS DI KELAS VIII SUATU SEKOLAH DI SEMARANG [BARRIERS TO LEARNING MATHEMATICS: A CASE STUDY OF GRADE 8 STUDENTS AT A SCHOOL IN SEMARANG]”. JOHME: Journal of Holistic Mathematics Education, vol. 3, no. 1, Dec. 2019, pp. 16-31, doi:10.19166/johme.v3i1.2071.