BR SINUHAJI, J. L.; NGURAH PUJAWAN, I. G. .; PARWATI, N. N. . Optimalisasi Pemahaman Konsep Geometri Bangun Datar Pada Siswa SMP Melalui Implementasi E-Modul Flipbook Bermuatan Masalah Kontektual: Tinjauan Sistematis: Optimization of Flat Shape Geometry Concept Understanding in Junior High School Students through the Implementation of Contextual Problem-Filled Flipbook E-Module: A Systematic Review. Citizen : Jurnal Ilmiah Multidisiplin Indonesia, [S. l.], v. 6, n. 2, p. 379–389, 2026. DOI: 10.53866/jimi.v6i2.1303. Disponível em: https://journal.das-institute.com/index.php/citizen-journal/article/view/1303. Acesso em: 18 may. 2026.