เรียนสุทธิ์ วรางคณา. “Forecasting of coconut prices using the Box-Jenkins method”. RMUTSB ACADEMIC JOURNAL 7, no. 1 (June 21, 2019): 87–100. accessed April 22, 2026. https://li01.tci-thaijo.org/index.php/rmutsb-sci/article/view/148447.