Rattasart Thoschuay. (2022) A Study of Development Model of Open Approach Activities on the European Continent of Mathayomsuksa 2 Students. <i>Interdisciplinary Academic and Research Journal</i>, <i>2</i>(4), 365-378.Rattasart Thoschuay. "A Study of Development Model of Open Approach Activities on the European Continent of Mathayomsuksa 2 Students". Interdisciplinary Academic and Research Journal 2 (2022):365-378.Rattasart Thoschuay. A Study of Development Model of Open Approach Activities on the European Continent of Mathayomsuksa 2 Students. DR.KEN Institute of Academic Development and Promotion:ม.ป.ท. 2022.