This is the most irritating problem that students face. Sometimes, even it occurs after doing hard work. I remember, recently it also happened to me with my assignment. Although, I spent a lot on that assignment. I dont know why it happened. Well, I dont want to make the same mistake with my thesis writing task because it is a very important task for my graduation. Therefore, I think I should go for any history dissertation writers service, but I am not sure whether they provide me plagiarism-free content or not because I have never availed of any online service. So, please let me know if anyone knows about it.