FARID, D. A. M.; WIRASTANIA, A.; HARTANTI, J. The Effectiveness of Flash Cards in Enhancing Students’ Self-Concept. Nusantara of Research : Jurnal Hasil-hasil Penelitian Universitas Nusantara PGRI Kediri, v. 11, n. 1, p. 37-45, 19 Mar. 2024.