Kanthachi, Nongnout. “A Study of Development Strategies for OTOP in Chiang Rai”. University of the Thai Chamber of Commerce Journal Humanities and Social Sciences 34, no. 1 (February 3, 2014): 1–14. accessed August 30, 2026. https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/188690.