Siregar, Agnes M., et al. “Penerapan Model Problem Based Learning Berbantuan Media Interaktif Wordwall Untuk Meningkatkan Hasil Belajar Peserta Didik ”. Education Journal : Journal Educational Research and Development, vol. 8, no. 2, Aug. 2024, pp. 458-65, doi:10.31537/ej.v8i2.1955.