Kamkankaew, P. “Phonetic Prowess in Practice: Unpacking Challenges, Strategies, and Best Practices in Pronunciation Training for Deutsch als Fremdsprache (DaF) Instruction”. Rajamangala University of Technology Tawan-ok Social Science Journal, vol. 13, no. 1, June 2024, pp. 59-73, https://so05.tci-thaijo.org/index.php/SocialJournal2rmutto/article/view/268563.