Tennakoon, Godakande Arachchilage Shanika Anuradhi, และ Satit Aditto. 2019. “Relationship of Household Characteristics and Vegetables Consumption Behavior With the Proportion of Income Spent on Vegetables in Ratnapura District, Sri Lanka”. วารสารแก่นเกษตร 47 (6):1315-22. https://li01.tci-thaijo.org/index.php/agkasetkaj/article/view/250054.