Ditamapai, J., Sirivongpaisal, N. and Suthummanonsal, S. (2012) “A Study of Physical Distribution Model in Suratthani Province”, Engineering and Applied Science Research, 38(2), pp. 129–137. available at: https://ph01.tci-thaijo.org/index.php/easr/article/view/1602 (accessed: 12 April 2025).