What types of documents can be included in the reference?

Reference is an indispensable part of academic research, which provides researchers with information on theoretical basis, data sources and research methods. References can contain many types of documents. The following are some common types:

1. Books: including monographs, teaching materials, papers, meeting minutes, etc. These books, usually written by experts, are rich in content and authoritative.

2. Journal articles: including papers, reviews and comments published in academic journals. These articles are usually peer-reviewed and of high quality, but we need to pay attention to the author, publication year, influencing factors and other factors.

3. Dissertations: including master's and doctoral dissertations. These papers are generally written by graduate students, and the research content is relatively in-depth, but attention should be paid to the quality of the papers and the author's background.

4. Reports: including government reports, enterprise reports and research reports. These reports usually contain a lot of data and empirical analysis, which can provide valuable reference for research.

5. Patents: including invention patents, utility model patents, design patents, etc. These patents usually involve technological innovation and practical application, which can provide information such as technical scheme and market prospect for research.

6. Standards and norms: including national standards, industrial standards and international standards. These standards and specifications usually stipulate the quality and performance requirements of products or services, which can provide technical guidance for research.

7. Electronic resources: including databases, e-books and electronic periodicals. These electronic resources have the advantages of convenient retrieval and timely update, and can provide rich information sources for research.

8. Network resources: including websites, blogs, forums, etc. These network resources usually contain a lot of information and opinions, but we need to pay attention to the authenticity and reliability of the information.

9. Meeting materials: including meeting papers, meeting manuals and meeting speeches. These conference materials usually reflect the latest research results and development trends in academic circles and can provide valuable reference for research.