Plangmarn, Acheraporn. “The Development of Tourism Element in Lampang Province”. University of the Thai Chamber of Commerce Journal Humanities and Social Sciences 35, no. 3 (June 19, 2019): 44–56. accessed August 30, 2026. https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/195882.