Laongdown Sangla และ Sutad Pintasen; Auytin Junmaung; Nopporn Tongplew. (2007) Effect of Spacing and Number Plant per Hill on Nutrition, Yield and Vegetable Soybean Quality. <i>Thai Agricultural Research Journal</i>, <i>25</i>(3), 227-239.Laongdown Sangla และ Sutad Pintasen; Auytin Junmaung; Nopporn Tongplew. "Effect of Spacing and Number Plant per Hill on Nutrition, Yield and Vegetable Soybean Quality". Thai Agricultural Research Journal 25 (2007):227-239.Laongdown Sangla และ Sutad Pintasen; Auytin Junmaung; Nopporn Tongplew. Effect of Spacing and Number Plant per Hill on Nutrition, Yield and Vegetable Soybean Quality. Department of Agriculture:ม.ป.ท. 2007.