แบ่งออกได้ 2 แหล่งใหญ่ คือ 1. ข้อมู

2. source: 1. from within the Organization (Internal Data Sources) are formed within the parties, so that researchers can use in an operation considered inside information. 2. information from the external organization (External Data Sources) is data that resides outside of which there are many, and more difficult to be a captive storage.

There are two main sources
of information within the organization 1. (Internal Data Sources) that is caused by internal affairs. The researchers used the data to be considered within
two. Information from appearances (External Data Sources) that is outside the business, there are many options. And it is difficult to collect data over internal affairs.

Break out 2 big source.1. Information from within the organization (Internal Data Sources) is created within the business. So the researchers used in operation is considered to be the internal information.2. Information from external organizations (External Data Sources) is the information outside the business, which there are many. It is much more difficult than the data within the business.