1, be sure to indicate the source, that is, the author of the cited document, the name of the document, the publishing house, the year and other information; It is also best to indicate the quoted chapters; References are generally listed in the references at the end of the paper;
2. When quoting the contents of the paper, you must be careful not to plagiarize in large paragraphs. It is best to quote only the author's point of view, or arguments with arguments, charts, research data, etc.
3. Unless the school has special requirements, it is generally not recommended to quote the unpublished papers of other teachers and students this year, because it is impossible to make public inquiries, which will be suspected of "plagiarism".