Development of Integrated Science Student Worksheets (LKPD) Based on a Scientific Approach on Environmental Pollution Material at SMPN 6 Padang Class VII. universe [Internet]. 31 Juli 2022 [dikutip 14 Agustus 2026];3(1):57-62. Tersedia pada: http://universe.ppj.unp.ac.id/index.php/universe/article/view/160