Samosir, C., Muhammad, I., Marchy, F. and Elmawati, E. 2023. Research Trends in Problem Based Learning in Middle School (1998-2023): A Bibliometric Review. Jurnal Sustainable. 6, 1 (Jun. 2023), 46-58. DOI:https://doi.org/10.32923/kjmp.v6i1.3237.