สิทธิสระ ส. “Using Semantic Mapping to Develop English Reading Skill of Upper Primary School Students, Wattan-En School, Phra Nakhon Si Ayutthaya”. RMUTSB ACADEMIC JOURNAL (HUMANITIES AND SOCIAL SCIENCES), vol. 4, no. 2, Dec. 2019, pp. 209-1, https://so05.tci-thaijo.org/index.php/rmutsb-hs/article/view/170798.