Srisuda Thippayarugs และ Chalaem Martwanna; Thongpoon Paenghakit; Woothisak Boothanoo; Chairoj Wongwiwatchai. (1998) Research on Improvement of Retting and Extraction of Roselle, Kenaf and Jute Fibre. <i>Thai Agricultural Research Journal</i>, <i>16</i>(2), 112-132.Srisuda Thippayarugs และ Chalaem Martwanna; Thongpoon Paenghakit; Woothisak Boothanoo; Chairoj Wongwiwatchai. "Research on Improvement of Retting and Extraction of Roselle, Kenaf and Jute Fibre". Thai Agricultural Research Journal 16 (1998):112-132.Srisuda Thippayarugs และ Chalaem Martwanna; Thongpoon Paenghakit; Woothisak Boothanoo; Chairoj Wongwiwatchai. Research on Improvement of Retting and Extraction of Roselle, Kenaf and Jute Fibre. Department of Agriculture:ม.ป.ท. 1998.