วุฒิพงษ์ เกร็ดทราย. “Using E-learning Instruction to Enhance English Pronunciation, Reading and Writing Skills on EFL Primary School Teachers’ Achievement and Motivation”. Parichart Journal 29, no. 1 (July 29, 2016): 216–242. accessed September 10, 2026. https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/49546.