Andini, K. P., and Supriyadi. “Analysis of the Application of the Project-Based Learning Model in Improving the Mutual Cooperation Attitude of Primary School Students: Analisis Penerapan Model Pembelajaran Berbasis Proyek Dalam Meningkatkan Sikap Gotong Royong Siswa Sekolah Dasar”. Indonesian Journal of Education Methods Development, vol. 21, no. 1, Sept. 2026, p. 10.21070/ijemd.v21i1.1090, doi:10.21070/ijemd.v21i1.1090.