“Implementasi Model Pembelajaran Berbasis Masalah Menggunakan Powerpoint Materi Stoikiometri Untuk Menigkatkan Hasil Belajar Siswa: Implementation of Problem Based Learning Model Using Powerpoint on Stoichiometry Lessons to Improve Student Learning Outcomes”. 2019. Talenta Conference Series: Science and Technology (ST) 2 (1): 279-83. https://doi.org/10.32734/st.v2i1.358.