Marzuki M. THE EFFECT OF IMPLEMENTING A COOPERATIVE LEARNING MODEL OF GROUP INVESTIGATION (GI) TYPE ON STUDENT LEARNING OUTCOMES ON ECOSYSTEM MATERIALS IN CLASS XA OF STATE MIDDLE SCHOOL 2 SINTANG. NJPIP [Internet]. 2023 Nov. 28 [cited 2024 Oct. 13];4(4):1091-10. Available from: https://ejournal.nusantaraglobal.or.id/index.php/nusra/article/view/1755