Suwanai Thakumsorn และ Duttawan Insorn. (2022) Legal Measures for Textbook Copyright Protection. <i>Interdisciplinary Academic and Research Journal</i>, <i>2</i>(5), 771-786.Suwanai Thakumsorn และ Duttawan Insorn. "Legal Measures for Textbook Copyright Protection". Interdisciplinary Academic and Research Journal 2 (2022):771-786.Suwanai Thakumsorn และ Duttawan Insorn. Legal Measures for Textbook Copyright Protection. DR.KEN Institute of Academic Development and Promotion.:ม.ป.ท. 2022.