NUKHBA, Rania; WULANDARI, Ika Pratiwi; ULUM, Fatchul; PARNO, Parno. Difficulty and Mastery of Physics Concepts for Middle School Students in Density Material. Kasuari: Physics Education Journal (KPEJ), [S. l.], v. 7, n. 1, p. 130–137, 2024. DOI: 10.37891/kpej.v7i1.522. Disponível em: https://journalfkipunipa.org/index.php/kpej/article/view/522. Acesso em: 13 may. 2026.