พรเจริญ ดร.บุญธรรม. “CASUAL RELATIONSHIP MODEL TOWARD PROBLEMS ON INCOME TAXATION FROM MARRIED COUPLES IN THAILAND”. Journal of the Association of Researchers 17, no. 3 (July 4, 2020): 136–150. accessed September 11, 2026. https://so04.tci-thaijo.org/index.php/jar/article/view/244285.