Vithanwatana, Songpol, and Tunpawee Ratpongporn. 2021. “Factors Affecting Work Performance of Chef in Thailand: A Conceptual Framework of Relation Linear Factors Affecting Performance”. Journal of Humanities and Social Sciences, Rajapruk University 7 (3):1-20. https://so03.tci-thaijo.org/index.php/rpu/article/view/257334.