Thinnam, Nalinee, and Pornpen Thippayana. 2021. “The Comparison of Cost and Return in Planting Green Hot Chili by Using Individual and Collaborative Farming in Pak Pha-Nang River”. Parichart Journal 34 (3):215-32. https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/247976.