Marzano, Gilberto, Velta Lubkina, and Luis Ochoa Siguencia. “KEY ISSUES IN ADULT NON FORMAL PARTICIPATORY E-LEARNING”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 4 (May 26, 2016): 69–79. Accessed November 24, 2024. https://journals.ru.lv/index.php/SIE/article/view/1540.