Pongsapukdee, V., & Sukgumphaphan, S. (2013). Goodness of Fit of Cumulative Logit Models for Ordinal Response Categories and Nominal Explanatory variables with Two-Factor Interaction. Science, Engineering and Health Studies, 1(2), 29–38. Retrieved from https://li01.tci-thaijo.org/index.php/sehs/article/view/7259