According to GB3469-83 File Types and File Carrier Codes, reference types and file types are identified by a single letter, mainly including:
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.
Extended data
The main types of references have the following formats:
1, monographs, papers, dissertations and reports
[serial number] Principal. Title of the document [Document Type ID]. Place of publication: publisher, year of publication. Page number (optional).
2. Newspaper articles
【 Serial number 】 Principal responsible person. File title [J]. Publication name, year, volume (issue): page numbers.
3. Patent documents
[serial number] patent owner. Patent name [P]. Patent country: patent number, publication date.
Baidu Encyclopedia-References