According to GB3469-83 "File Types and File Carrier Codes", reference file types and file types are identified by a single letter:
Monograph m; Newspaper n; Journal j; Patent document p; Compilation g; Ancient books o; Technical standards;
Dissertation d; Scientific and technological report; Reference tool k; Search tool w; File b; Tape a;
Chart q; Record l; Product sample x; Video tape v; Meeting minutes; Chinese translation test;
Music score I; Movie y; Manuscript h; Microfilm u; Slide z; Miniature flat film f; Other e.
For example: [4] Feng Xiqiao. LBB Analysis of Pressure Piping and Pressure Vessel of Nuclear Reactor [R]. Beijing: Tsinghua University Institute of Nuclear Energy Technology Design and Research, 1997.
Extended data:
References (tables) should generally be listed after academic papers for three purposes, namely:
In order to reflect the real scientific basis;
In order to reflect a serious scientific attitude, distinguish one's own views or achievements from those of others;
In order to show respect for the scientific achievements of predecessors, we should also indicate the source of the cited materials for easy retrieval.
The writing of graduation thesis should be based on a rigorous and realistic scientific attitude. If others' achievements are cited, they should be listed in the references in the order in which they appear in the papers, and only the relevant works and papers cited or referenced in the paper should be listed. References should list the main references directly cited in the order in which they appear in the text.
Baidu Encyclopedia-References