B. Apsitpinyo, W. Apsitpinyo, A. Pechwong, and P. Baipho, “A Study of Costs and Returns: A Case Study of Khok Lam Village’s Grilled Catfish Chili Paste to Promote Community Economy”, JMSNRRU, vol. 5, no. 1, pp. 32–44, Jun. 2026.