Lalaeng, C. (2019) “An Analysis of Costs and Returns and Production Efficiency of Economic Crops in South of Thailand”, University of the Thai Chamber of Commerce Journal Humanities and Social Sciences, 36(4), pp. 1–17. available at: https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/188031 (accessed: 18 April 2025).