Astuti, Novi, and Kusno Kusno. “Upaya Meningkatkan Keterampilan Kolaborasi Siswa Kelas IV SDN Ledug Melalui Model Problem Based Learning Pada Mata Pelajaran IPAS”. Proceedings Series on Social Sciences & Humanities, vol. 24, July 2025, pp. 317-22, doi:10.30595/pssh.v24i.1613.