Hakop Walangadi , Elmia Umar , Nurain Saleh. “IMPROVING LEARNING OUTCOMES USING IPS LEARNING PROBLEM-BASED LEARNING APPROACH IN CLASS IV STUDENTS OF SDN 7 TELAGA BIRU GORONTALO DISTRICT”. British Journal of Global Ecology and Sustainable Development 11 (December 14, 2022): 28–40. Accessed January 31, 2025. http://journalzone.org/index.php/bjgesd/article/view/172.