“Pengembangan Perangkat Pembelajaran Matematika Model Pembelajaran Berbasis Masalah Untuk Meningkatkan Kualitas Proses Dan Hasil Belajar Di SMP: Developing of Mathematics Learning Devices With Problem Based Learning Model to Improve Process Quality and Learning Outcomes of Junior High School”. Talenta Conference Series: Science and Technology (ST), vol. 2, no. 2, July 2019, https://doi.org/10.32734/st.v2i2.544.