Phitthayaphinant, Purawich, Ayut Nissapa, and Buncha Somboonsuke. 2016. “Consumers’ Attitudes towards Marketing Mix of Health Products Made from Cold-Pressed Palm Oil in Hatyai District, Songkhla Province”. WMS Journal of Management 1 (2):68-81. https://so06.tci-thaijo.org/index.php/wms/article/view/52951.