Nanda, E., and S. Murwitaningsih. “Pengaruh Model Problem Based Learning Berbantuan Crossword Puzzle Terhadap Hasil Belajar IPAS Kelas IV SD”. Ideguru: Jurnal Karya Ilmiah Guru, Vol. 10, no. 1, Sept. 2024, pp. 50-56, doi:10.51169/ideguru.v10i1.1356.