A study on the basic theoretical knowledge and research related to their research, the relationship between the subject. The problem data, including document and study than มื้ is related to the subject of research.
The study of fundamental knowledge and theories related to the research for the researchers to see the relationship between the subject and the information, including documents related to the subject of the research activities Mืag.
The basic knowledge and theories related to research for the researcher to see the relationship between the problem data. Including the document study and activities that are related to the subject's research.