There are more than 10 references for undergraduate graduation thesis, including more than 2 foreign documents (papers identified as special types by tutors may not be listed as foreign documents). References must be publicly published (including online downloads) works or periodicals (papers), uniformly placed at the end of the article, naturally numbered with Arabic numerals in the order in which they appear in the article, and surrounded by square brackets. However, it is not clear how many documents should be cited in journal papers. You should cite enough literature to support your thesis, the number depends on the existing literature in this field. If your topic is new, there may not be many documents to refer to. On the contrary, if you are working on a topic that has been discussed before, there may be many documents. In addition, this is also related to the type of your article, and there are usually many quotations in the review article. Some people think that the more references cited, the more the author pays attention to the citation problem and respects the achievements of other authors. Others say that the more references cited, the more water in the article, which means that it is pieced together from the cited documents. In fact, these are unreasonable, just moderate, and can explain their own problems. Generally speaking, there is no limit to the number of articles, especially how many periodicals you want to read on your topic. There is no requirement. The requirement of this question is not the number of articles, but other aspects:

1. Have you read the classic literature of your major, especially some classic summary articles? You must read them and of course quote them. Have you read the latest literature of your major? You'd better read the literature in the last five years before writing an article. Have you read the articles published in the journals you contributed? It is recommended to quote one or two articles.