SOMSAMONE, V., O. SISAVANH, S. SOUNTHALY, S. SENGCHANH, K. MIXAYKONE, and B. INTHAJACK. “ Luangprabang Province”. Souphanouvong University Journal Multidisciplinary Research and Development, vol. 6, no. 1, May 2020, pp. 162-8, http://www.su-journal.com/index.php/su/article/view/252.