Pathompong Tiengladdawong และ Dolchai La-ornual. (2022) Perceived Risk and Willingness-to-Pay for Different Organic Certification Levels in Thailand. <i>International Journal of Multidisciplinary in Management and Tourism</i>, <i>6</i>(1), 88-98.Pathompong Tiengladdawong และ Dolchai La-ornual. "Perceived Risk and Willingness-to-Pay for Different Organic Certification Levels in Thailand". International Journal of Multidisciplinary in Management and Tourism 6 (2022):88-98.Pathompong Tiengladdawong และ Dolchai La-ornual. Perceived Risk and Willingness-to-Pay for Different Organic Certification Levels in Thailand. Luangporyai Association:ม.ป.ท. 2022.