Manalu, S. 2021. Upaya Meningkatkan Prestasi Belajar Matematika Melalui Penggunaan Strategi Problem Posing Berkelompok: Efforts To Increase Mathematics Learning Achievement Through The Use Of Group Posing Problem Strategies. Neraca: Jurnal Pendidikan Ekonomi. 7, 1 (Oct. 2021), 59–63. DOI:https://doi.org/10.33084/neraca.v7i1.2841.