NAINGGOLAN, Bajoka; SIMAMORA, Martin; HUTABARAT, Wesly. Development of chemical element practical workbook based on projects and characters for class xii senior high school. Jurnal Pendidikan Kimia, [S. l.], v. 11, n. 3, p. 67–78, 2019. DOI: 10.24114/jpkim.v11i3.15733. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/15733. Acesso em: 31 jul. 2025.