Thank you for your comments.
In my report, I had given a reference. However, I want to explain about these which I quoted and posted here. If I knew these paragraph from wikipedia, I would not post here and checked again. Because I quoted it from friend on Facebook so I not sure about their grammar . Therefore, I posted here and checked their grammar, I didn't mean that I checked which wikipedia wrote. In the future, if I quote someone text, I will carefully examine and afterward, if I post, I will post my writing. Sorry for misunderstanding.
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