Mohebi, Mehrdad, Tabatabaei, Omid, Salehi, Hadi, Yunus, Melor. “Effects of Different Modes of Spacing on Iranian EFL Learners' Lexical Knowledge Development: Proficiency Levels in Focus.” Journal of New Trends in English Language Learning (JNTELL), vol. 2, no. 1, 2023, pp. 71-83. 10.30495/jntell.2023.1973341.1030