Dahlan, T., D. Darhim, D. Juandi, N. Gardenia, and T. Kandaga. “HIGH SCHOOL STUDENTS’ ATTITUDES TOWARDS MATHEMATICS LESSONS USING THE PQ4R STRATEGY AND PROBLEM POSING MATHEMATICAL PROBLEMS”. Kalamatika: Jurnal Pendidikan Matematika, Vol. 6, no. 2, Nov. 2021, pp. 171-80, doi:10.22236/KALAMATIKA.vol6no2.2021pp171-180.