Rungwichitsin, Narongchai, and Sumalee Chinokul. 2022. “Effects of Interleaved Practice With Cumulative Schedule on Thai Lower Secondary students’ Long-Term Retention of Grammatical Knowledge and Their Perception towards the Instruction”. Kasetsart Journal of Social Sciences 43 (2):361‒368. https://so04.tci-thaijo.org/index.php/kjss/article/view/258494.