1 .Hongwiset, U., Aimsaard, A., Kongin, W., & Kakham, P. (2021). Development of speaking and listening ability using total physical response method of Prathom Suksa 3 students at Ban Song School. In Proceedings: The 2nd International and National Conference on Multidisciplinary Innovation Development in the 21st Century (pp. D.87-D96). Bansomdejchaopraya Rajabhat University.

2. Pongchai, T., Aimsaard, A., Kongin, W., & Kakham, P. (2021). Development of speaking and listening ability using total physical response method of Prathom Suksa 2 students at Wat Pomwichian Chotikaram School. In Proceedings: The 2nd International and National Conference on Multidisciplinary Innovation Development in the 21st Century (pp. D.97-D106). Bansomdejchaopraya Rajabhat University.

3. Suapoomee, W., Aimsaard, A., Kongin, W., & Kakham, P. (2021). Development of speaking and listening ability using natural approach of Prathom Suksa 2 students at Sanakorn Nikom Klua School. In Proceedings: The 2nd International and National Conference on Multidisciplinary Innovation Development in the 21st Century (pp. D.77-D86). Bansomdejchaopraya Rajabhat University.

4. Phadet Kakham.“Euphemisms in English Language” วารสารวิชาการมนุษยศาสตร์และ
สังคมศาสตร์ มหาวิทยาลัยราชภัฏธนบุรี (ฉบับที่ 2 พฤษภาคม-สิงหาคม 2561) น. 112-117