The source of the information.Important sources of data, including individual photos, maps, charts, or even an object, object, it is a source of information at all. Generally can be classified according to data sources have 2 types.1) primary data is stored up to meet the objective of students. Especially, selection and use of information data. The researcher can choose to collect the data meets the requirements and in accordance with the objective ตลอดจนเทคนิค analysis. The disadvantage is that the waste of time, cost, and may be of inferior quality.2) data is the data with various who collect or gather before. Only those new study researchers data such as census data, statistics from the agency, and documents of all types.
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