Tangchitcharoenkhul, R. (2022) “A concise introduction to mixed methods research”, Suan Dusit Graduate School Academic Journal. Bankok, Thailand, 18(3), pp. 245–247. available at: https://so19.tci-thaijo.org/index.php/SDUGSAJ/article/view/452 (accessed: 29 August 2026).