ควรกล่าวถึงที่มาของปัญหาหรือเหตุผลข

Should also mention the source of the problem or reason for doing research in the most ayangkrachap. There is no need to cite a source, long stretches telling just the motivation that research was enough. Occasionally, it may be combined with the abstract, it is but appropriate, or sometimes they don't want to put down.

You should mention the source of the problem or the reason for doing research on that matter most succinctly. Not necessarily refer to the source to tell just long enough incentive for research. Sometimes, it may be integrated. Abstract with it as appropriate Or sometimes you do not put down. It was also

It should be mentioned at the source of the problem and reason of conducting research in the as most fitting, there's no need to refer to the source to stretch long. Tell only motivation research work. Sometimes may be included.Or sometimes do not have to put down.