“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), pp. 289–292. doi:10.32734/st.v2i1.360.