Valatkienė, Stasė. “Individualization of Teaching in the U.S.A”. Acta Paedagogica Vilnensia 2 (December 28, 1993): 91–108. Accessed October 26, 2025. https://test.zurnalai.vu.lt/acta-paedagogica-vilnensia/article/view/9369.