Garbačiauskienė , M., and B. Grigaitė. “Mastering of Written Language As One of the Conditions of Transition from Pre-Conceptional to Conceptional Thinking”. Psichologija 1 (December 23, 1980): 24–36. Accessed May 4, 2024. https://www.journals.vu.lt/psichologija/article/view/9155.