Noisaat, S., Kantai, N., Bunwatsana, A., Songroek, N., Yutiphong, S., Phromsri, K. and Thanchan, N. (2021) “Solving Problems in Corrugated Box Manufacturing with 5 Why Analysis Technique and 5 S Activity”, Siam University Journal of Business Administration. Bangkok, Thailand, 22(38), pp. 1–8. available at: https://so07.tci-thaijo.org/index.php/sujba/article/view/13 (accessed: 26 June 2025).