Nikma, Julia Khoirun, et al. “THE EFFECT OF OUTDOOR LEARNING-BASED PROBLEM-BASED LEARNING MODEL ON LEARNING OUTCOMES IN TERMS OF STUDENT ACTIVITY IN ECOSYSTEM MATERIAL CLASS VII MTS NEGERI 4 BOJONEGORO”. International Journal Multidisciplinary (IJMI), vol. 1, no. 3, July 2024, pp. 18-25, doi:10.61796/ijmi.v1i3.164.