Utari, M. D., and V. Mandarani. “Flashcards Improve Junior High Students Vocabulary Achievement: Kartu Flash Meningkatkan Pencapaian Kosakata Siswa SMP”. Indonesian Journal of Education Methods Development, vol. 21, no. 4, Feb. 2026, p. 10.21070/ijemd.v21i4.1045, doi:10.21070/ijemd.v21i4.1045.