Apichart Payakkhin. (2014) The Development of Critical Thinking Skills with 2(CPA) Model on the Climate Change Interdisciplinary Learning Unit for Lower Secondary Students. <i>SOCIAL SCIENCES RESEARCH AND ACADEMIC JOURNAL</i>, <i>9</i>(27), 77-90.Apichart Payakkhin. "The Development of Critical Thinking Skills with 2(CPA) Model on the Climate Change Interdisciplinary Learning Unit for Lower Secondary Students". SOCIAL SCIENCES RESEARCH AND ACADEMIC JOURNAL 9 (2014):77-90.Apichart Payakkhin. The Development of Critical Thinking Skills with 2(CPA) Model on the Climate Change Interdisciplinary Learning Unit for Lower Secondary Students. Graduate School;Nakhon Sawan Rajabhat University:ม.ป.ท. 2014.