Harahap, S. K. S.; Simanjuntak, E. B.; Nababan, M. A.; Tambunan, T. V.; Tambunan, N. P.; Nadapdap, S.; Afsah, S.; Pane, A. A. The Influence of Identity Material on Gender Identity Development in Elementary School Students. jptam 2025, 9, 9638-9643.