ศุภนัท อ. ความเต็มใจจ่ายสำหรับข้าวเสริมแคลเซียม (WILLINGNESS TO PAY FOR CALCIUM-COATED RICE). Srinakharinwirot Research and Development Journal of Humanities and Social Sciences, Bangkok, Thailand, v. 9, n. 18, July-December, p. 230–240, 2018. Disponível em: https://so04.tci-thaijo.org/index.php/swurd/article/view/123782. Acesso em: 2 may. 2024.