1. Types of references: monographs [M], essays [C], newspaper articles [N], journal articles [J], dissertations [D], reports [R], standards [S], patents [P], and precipitated documents [A] in theses.

2. Types of electronic documents: database [DB], computer [CP] and electronic bulletin [EB].

3. Carrier types of electronic documents: Internet [OL], compact disc [CD], magnetic tape [MT] and disk [DK].

Reference specification requirements:

References are continuously coded with Arabic numerals in the order in which they appear in the text, and the serial numbers are placed in square brackets. If the file is referenced repeatedly, it is marked with the same serial number in the text.

When recording figures, it is necessary to keep the original form of the document, but the volume number, page number, publication year and version number are represented by Arabic numerals. The versions of foreign documents are expressed by abbreviations of ordinal numbers (1 version is not recorded, but descriptions of other versions need to be recorded).