“Pengaruh Model Problem Based Learning Dengan Media Audio Visual Dan Laboratorium Riil Materi Asam Basa Terhadap Hasil Belajar: The Effect of Problem Based Learning Model Using Audio Visual Media and Real Acid Base Material Laboratory on Learning Outcomes”. 2019. Talenta Conference Series: Science and Technology (ST) 2 (1): 289-92. https://doi.org/10.32734/st.v2i1.360.